21. Our English teacher often tells ________ to speak more English in class.
A. we B. us C. our D. ours
22. Liu Xiang was born in Shanghai ________ 1983.
A. in B. at C. on D. to
23. ---- What can you see in the picture?
---- I can see a farm. And there ________ a lot of animals on it.
A. is B. are C. will be D. be
24. Tony wanted to take some good photos, ________ he lost his camera.
A. or B. and C. but D. so