用that, which, who, whom, whose填空。
1. This is the boy ______ mother teaches us Chinese m our school.
2. Please pass me the book ______ cover is black.
3. Is this factory the one ______ a lot of students visited yesterday?
4. The first thing ______ we should do is to clean the room.
5. You should do all ______ I told you to do.
6. The naughty boy can do something _____ will give you trouble.
7. This is the tallest building _____ I have ever seen.
8. This is the very person _____ I need.
9. There is little _____ I can give you.
10. I will never forget the day _____ I spent with you.
11. This is the factory _____ I visited.
1. whose 2. whose 3. that/ which 4. that 5. that
6. that 7. that 8. that/ who 9. that 10. that/which
11. which/that