1. Đáp án: Their daughters, both of whom are in university, can’t visit them very often.
Giải thích: Câu này sử dụng mệnh đề quan hệ "both of whom are in university" để bổ sung thông tin về "their daughters".
2. Đáp án: Their house, most of which had been found in the street, was full of cats.
Giải thích: Mệnh đề quan hệ "most of which had been found in the street" cung cấp thông tin thêm về "cats".
3. Đáp án: The two rooms, neither of which had windows, were small and dirty.
Giải thích: Mệnh đề quan hệ "neither of which had windows" mô tả thêm về "the two rooms".
4. Đáp án: He was given a lot of gifts, most of which are expensive.
Giải thích: Mệnh đề quan hệ "most of which are expensive" bổ sung thông tin về "a lot of gifts".
5. Đáp án: She has three brothers, two of whom are in the army.
Giải thích: Mệnh đề quan hệ "two of whom are in the army" cung cấp thông tin về "three brothers".
6. Đáp án: I read three books last month, one of which I really enjoyed.
Giải thích: Mệnh đề quan hệ "one of which I really enjoyed" bổ sung thông tin về "three books".
7. Đáp án: Those flats, one of which I rented, are quite spacious.
Giải thích: Mệnh đề quan hệ "one of which I rented" cung cấp thông tin về "those flats".
8. Đáp án: Our new neighbours, many of whom we know quite well, are very friendly.
Giải thích: Mệnh đề quan hệ "many of whom we know quite well" bổ sung thông tin về "our new neighbours".
9. Đáp án: He has written several novels, a couple of which are really excellent.
Giải thích: Mệnh đề quan hệ "a couple of which are really excellent" cung cấp thông tin về "several novels".
10. Đáp án: The book took me a long time to finish, much of which I found hard to follow.
Giải thích: Mệnh đề quan hệ "much of which I found hard to follow" bổ sung thông tin về "the book".