English

The phrase 'a three hundred-dollar suit' uses 'hundred-dollar' as a compound adjective describing the suit's price. 'Hundred-dollar' is singular and hyphenated correctly, making option C the correct choice.

In the sentence, 'less' modifies the adjective 'attention,' describing the degree or amount of attention. Therefore, 'less' functions as an adjective here, indicating a smaller quantity.

Option D is grammatically correct because it uses the correct passive form 'should be avoided' and includes the article 'a' before 'good health,' making the sentence clear and proper.

Option B is the correct passive voice form of the sentence, using the past tense 'was upbraided' to match the original meaning. The other options contain grammatical errors or incorrect verb forms.

Option C correctly uses the passive voice to express that 'the fight was not given up by him,' which accurately reflects the original active sentence meaning. The other options are grammatically incorrect or awkward in passive construction.

The correct word to complete the sentence is 'knew' because it fits the meaning that nobody was aware that the old man had fallen. 'Noted' and 'noticed' do not fit well with 'nobody' in this context, and 'none of these' is not appropriate since 'knew' is a valid option.

The word 'celibate' means abstaining from marriage and sexual relations. The antonym is 'married,' which implies being in a marital relationship, the opposite of celibacy.

The word 'undergo' means to experience or endure something, so 'Experience' is the correct synonym. The other options do not have meanings related to 'undergo'.

The word 'sceptical' means having doubts or being doubtful. Its antonym is 'certain,' which means being sure or confident. Therefore, option C is the correct antonym.

The phrase 'worth remembering' is the correct idiomatic expression. 'Worth' is followed by a gerund (-ing form), so 'remembering' is the correct choice.