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"Vast" describes something extremely large in size or extent, so "huge" is the nearest synonym. The other choices describe small size, narrow width or little depth rather than great size.
"Ancient" means very old, so its opposite is "modern", which means of the present time. The other three words all carry a sense of being old.
"Each" is a singular indefinite pronoun, so it takes a singular verb, "has". The phrases "of the students" do not change the number of the subject.
The choice between "a" and "an" depends on sound, not spelling. The "h" in "honest" is silent, so the word begins with a vowel sound and takes "an".
The familiar spelling rule is "i before e except after c", and in "receive" the vowel pair follows a c, so it is written -ei-. The other spellings either reverse the vowels or drop a needed letter.
"Child" is an irregular noun whose plural is "children", formed without adding -s. Forms such as "childs" and "childrens" add a regular ending to a form that is already plural.
The adjective "good" is followed by "at" when describing ability in a subject or activity. This is a fixed collocation in standard English.
"Go" is an irregular verb, and its simple past is "went". "Gone" is the past participle, which is used with auxiliary verbs such as "has" or "have".
To "turn a deaf ear" is to refuse to listen or pay attention to something. The expression is figurative and has nothing to do with actual hearing loss or with volume of speech.
The original is in the present continuous, so the passive must use "is/are being + past participle", giving "is being built". Any other tense would change the time reference of the original sentence.
When the reporting verb is in the past ("said"), the present tense of the direct speech normally shifts back to the past, so "am" becomes "was". Keeping the present tense or introducing a new tense distorts the original statement.
The sentence sets hard work against failure, so the linking word must express contrast, and "yet" does that. "So" and "therefore" express result, while "because" expresses cause.
A period of ten years is a "decade", from a Latin root meaning ten. A century is a hundred years, a millennium a thousand years, and a score twenty years.
"Since" is used with a point in time when the action began, and it fits perfect tenses such as "has been working". "For" takes a length of time, while "from" and "during" do not carry the same perfect meaning.
A prognosis is a forecast of how an illness is expected to develop, which is why it can be called hopeful. It does not refer to money, medicine or a place in the hospital.
"Scarce" means in short supply, so its antonym is "ample", meaning more than enough. "Rare", "sparse" and "meagre" all suggest shortage rather than abundance.
In a hypothetical if-clause that is contrary to fact, standard English uses the past subjunctive "were" for every person. "Was" is heard informally but is not the accepted form in this construction.
The correlative pair "not only ... but (also)" is used to link two parallel adjectives. "And", "also" and "too" cannot complete this fixed construction.
"Children" is an irregular plural that does not end in -s, so its possessive is formed by adding 's, giving "children's". The other forms either omit the apostrophe, misplace it, or make the objects rather than the owners possessive.
"News" is an uncountable noun that ends in -s but takes a singular verb, so "is" is correct. The plural verbs listed do not agree with it.
With "neither ... nor", the verb agrees with the subject nearest to it, which here is the plural "assistants", so "were" is required. Singular forms would be correct only if both subjects were singular.
The expression comes from a fable in which the mice must hang a bell on a cat, so it means to undertake a dangerous or risky task. It is not about avoiding danger, making noise or giving a quiet warning.
"Ephemeral" comes from Greek words meaning "lasting a day" and so describes something short-lived. "Lasting for ever" is its opposite, while value and fame are unrelated ideas.
"No sooner" is followed by "than" in this fixed comparative construction. "When" and "then" are often substituted by mistake, and "that" belongs to other patterns such as "so ... that".
The inverted "Had he studied" clause describes an unreal situation in the past, so the main clause needs "would have + past participle". The other options refer to the present or future and do not match the past unreal meaning.
The choice between 'a' and 'an' depends on the initial sound of the following word, not its first letter. 'MBA' is pronounced with an initial vowel sound (/em/), so the indefinite article 'an' is required.
The verb 'married' is followed by the fixed preposition 'to' when naming the spouse. This collocation holds in both British and American English.
'Diligent' describes a person who works steadily and with careful effort. 'Hardworking' carries the same core sense of persistent application.
English uses specific collective nouns for different animals. The established term for a group of lions is a 'pride'.
In 'accustomed to', the word 'to' functions as a preposition, not as part of an infinitive. A preposition is followed by a noun or a gerund, so the -ing form is correct.
The idiom refers to approaching a subject indirectly instead of stating it plainly. A speaker who beats about the bush delays the central point.
When a verb ending in a single vowel plus consonant takes a suffix beginning with a vowel, the final consonant is doubled and the final 'e' is dropped before '-ence'. This produces 'occurrence'.
'Between' is a preposition, and prepositions take the object form of a pronoun. The object form of the first-person pronoun is 'me'.
The adverb 'highly' modifies an adjective, and the verb 'found' here takes an adjective describing the remarks. The adjective formed from 'objection' is 'objectionable'.
When exactly two items are compared, English uses the comparative form, not the superlative. The comparative of 'impressive' is 'more impressive'.
'Should have' plus a past participle expresses a past obligation or expectation that was not fulfilled, often carrying mild criticism. That meaning fits the speaker's complaint about being told late.
The phrasal verb 'call off' means to cancel something. Since the match did not take place, 'off' supplies the required meaning.
An introductory participial phrase must describe the subject of the main clause. Only the version with 'I' as subject makes the walker and the noticer the same person.
'Platitude' denotes a remark that is flat, commonplace and often uttered without real conviction. The context of a political speech supports this sense of worn-out generalities.
The clause begins with the relative pronoun 'that' and modifies the noun 'book', so it functions exactly like an adjective. Relative clauses of this kind are therefore called adjective clauses.
Rewrite both fractions over the lowest common denominator, which is 12: 3/4 becomes 9/12 and 5/6 becomes 10/12. Adding the numerators gives 19/12, which can also be written as the mixed number 1 7/12.
Split 15% into 10% plus 5%. Ten percent of 240 is 24 and five percent is half of that, namely 12, so the total is 24 + 12 = 36.
The ratio has 5 + 4 = 9 equal parts, so one part is 720 ÷ 9 = 80. The smaller share is 4 parts, that is 4 × 80 = 320.
The mean is the sum of all the values divided by how many values there are. The five numbers add to 120, and 120 ÷ 5 = 24.
Write both numbers in prime factor form: 84 = 2 x 2 x 3 x 7 and 126 = 2 x 3 x 3 x 7. The HCF takes each shared prime the fewest times it appears: 2 x 3 x 7 = 42.
Simple interest is calculated as principal x rate x time divided by 100. Here 5000 x 8 x 3 / 100 = 1200 rupees.
A number is divisible by 9 exactly when the sum of its digits is divisible by 9. The digits of 4536 add to 4 + 5 + 3 + 6 = 18, which is a multiple of 9.
Two decimal places means keeping two digits after the point. The third digit is 6, which is 5 or more, so the second digit is rounded up from 4 to 5, giving 7.85.
Expand the bracket to get 3x - 12 = 2x + 5. Subtracting 2x from both sides gives x - 12 = 5, and adding 12 to both sides gives x = 17.
For a quadratic ax^2 + bx + c = 0 the sum of the roots equals -b/a. Here a = 2 and b = -6, so the sum is -(-6)/2 = 3.