21. — Shall I keep an eye on your house when you are on holiday?
— Thanks a lot. ______.
A. It’s up to you B. Of course, you should
C. If you should like D. I would appreciate that
22. Some of them came to a big river where they made _____ as _____ fishermen.
A. livings; the B. a living; 不填 C. a living; the D. living; 不填
23. I mean half of them, ______ is 50, can speak fluent Chinese.
A. it B. which C. who D. that
