English

The correct preposition to use in the phrase 'It was kind ___ you to help' is 'of'. This is a fixed expression in English where 'kind of you' means that the person showed kindness by helping.

The word 'reluctant' means unwilling or hesitant to do something. Among the options, 'Unwilling' is the closest synonym, while the others have opposite meanings.

"Bonhomie" means cheerful friendliness or geniality, so the synonym is "friendliness." The other options do not relate to this meaning.

The correct preposition to use with 'the end of the lesson' is 'at', as it indicates a specific point in time when the homework was set.

A "clique" refers to a small, exclusive group of people who share similar interests or activities, making option C the correct choice.

The phrase 'all my doubts were dispelled' means that the doubts were removed or eliminated, which fits the context of being convinced by cogent arguments. The other options do not logically fit the sentence meaning.

The correct preposition to use when referring to the quality of food served at a place is 'at'. The phrase 'The food is very good at that restaurant' is grammatically correct and idiomatic.

The correct preposition to use with 'cares' in this context is 'about,' as it indicates concern or interest in something, such as the environment.

The word 'bemoan' means to express sorrow or lament about something. Among the options, 'Lament' is the closest synonym, meaning to express grief or regret. Other options like 'Denounce' and 'Loathe' have different meanings, and 'Soothe' is almost opposite in meaning.

The correct preposition to use in this expression is 'on behalf of,' which means representing or speaking for others. Therefore, 'I would like to thank you on behalf of all of us' is correct.