Identify the correct grammatical structures and idioms in the following sentences:

Here are the solutions to the questions: 41) The problem was as difficult for the master as it was for the student. The phrase "as...as" is used for comparison. "As it was" completes the comparison, indicating the difficulty was the same for both. The correct option is A*. 42) Fufu would have been fluent in French if he had had tertiary education. This is a third conditional sentence, which describes a hypothetical situation in the past. The structure is "If + past perfect, would have + past participle." The correct option is C*. 43) But for you, I would have died. "But for" is an idiom meaning "if it had not been for" or "without". The correct option is A*. 44) The doctor kept his patients waiting for hours on end. "Hours on end" is an idiom meaning "for many consecutive hours." The correct option is C*. 45) I'd rather Kojo didn't smoke here. When expressing a preference for someone else's action in the present or future, "I'd rather" is followed by the past simple tense. The correct option is A*. 46) There's no place like home, is there? This is a tag question. The main clause "There's no place like home" is a negative statement using "there is," so the tag should be positive and use "there." The correct option is C*. 47) You would have stolen my book, wouldn't you? This is a tag question. The main clause "You would have stolen my book" is a positive statement using "would have," so the tag should be negative and use "would." The correct option is B*. 48) There isn't much sugar left in the bag, is there? "Sugar" is an uncountable noun. In negative sentences, "much" is used with uncountable nouns. The correct option is C*. 49) I haven't seen my friend since he's been gone. "Since" is used to indicate a point in time from which an action or state has continued, often with the present perfect tense. The correct option is C*. 50) The school store was so untidy that we thought it had been burgled. The main clause is in the past tense ("was so untidy"). The burglary must have occurred before or at the time of the untidiness, requiring the past perfect passive ("had been burgled"). The correct option is C*. 51) Nana Ama will go back to the town if she finds the door locked. This is a first conditional sentence, describing a real possibility in the future. The structure is "If + present simple, will + base verb." The correct option is A*. 52) The deceased did not have any achievements to be remembered for. The correct preposition to use with "remembered" in this context is "for" (to be remembered for something). The correct option is B*. 53) We have been here for too long; it is about time we left. The phrase "it is about time" is followed by the past simple tense to express that something should happen or should have happened already. The correct option is C*. 54) Adwoa met Jojo and they hugged each other. "Each other" is a reciprocal pronoun used when two people perform the same action to one another. The correct option is B*. 55) The Minister of Interior promised that he would repatriate all illegal aliens. This is reported speech. When reporting a promise made in the past, "will" changes to "would." The correct option is C*. 56) We are used to eating at this restaurant. The phrase "be used to" (meaning accustomed to) is followed by a gerund (the -ing form of the verb). The correct option is A*. 57) I owe a lot of gratitude to my rescuers. The correct prepositional phrase is "owe gratitude to someone." The correct option is D*. 58) It is a pity that Akua and Ama are quarrelling over a boyfriend. "To quarrel over something" means to argue about that particular thing.