9 câu nhaaa giải thích đầy đủ giúp mình 1. We are talking about the writer ______ latest book is one of the best-sellers this year. A. which B. whose C. whom D. who 2. He bought all the books ______ are needed for the English course. A. that B. what C. those D. whose 3. The children, ______ parents work late, are taken home by bus. A. that B. whom C. whose D. their 4. Our hotel, ______ is converted 17th century manor house, is very comfortable A. which B. that C. where D. when 5. Do you know the boy ______ at the party last week? A. we talked about B. about him we talked C. we talk about him D. who we talked about him 6. The exercises which we are doing ______ very difficult. A. is B. has been C. are D. was 7. The machine ______ has now been repaired. A. that broken down C. that broke down B. which are broken down D. which broke 8. The man ______ on the chair behind me kept talking during the film, ______ really annoyed me. A. having sat/ that B. sitting/ which C. to sit/ what D. to be sitting/ who 9. Neil Armstrong was the first person ______ foot on the moon. A. set B. setting C. to set D. who was set