7. He tried to remember the names of all the people who were there that night.

Answer: B

Explanation:

He tried to remember the names of all the people that night.

Using "that" in this context effectively introduces a restrictive clause which specifies the people being referred to, making the sentence clear and concise.

A) Whom

"Whom" is incorrect in this context because it is used to refer to the object of a verb or preposition. In this sentence, the subject is "the names," making "that" the appropriate choice to introduce the clause.

B) That

"That" is the correct choice because it introduces a restrictive clause, which provides essential information about "the people." This usage clarifies which specific individuals are being remembered, making the sentence grammatically and contextually accurate.

C) Which

"Which" is typically used for non-restrictive clauses that add extra information rather than essential details. In this case, the sentence requires a restrictive clause, making "that" the better option.

D) Whose

"Whose" indicates possession and is not appropriate here, as the sentence does not seek to express ownership. The focus is on identifying the people present, which "that" accomplishes effectively.

Conclusion

The correct answer is "that" because it appropriately introduces a restrictive clause that specifies the group of people being referred to. Other options fail to fulfill the grammatical requirements of the sentence, either by misidentifying the role of the word or by providing non-essential information. This highlights the importance of correct clause introduction in sentence structure.