21. He can swim. _______ .
A. So I can B. So can I C. I so can D. Can I so
答案：B. “他会游泳，我也会。”注意两句时态一样。
22. Will there be a strong wind ____ the north ______ the Huanghe River ?
A. to... of B. to... off C. at... of D. on, off
答案： A.
23. Did it snow _______ last night ?
A. heavy B. heavily C Quick D. fast
答案： B. 用副词修饰动词。
24. _______ cold it is today！
A. How B. How a C. What D. What a
答案： A. How引导感叹句，后用形容词或副词；what引导感叹句，后用名词。
25. Is this book different ______ that one ?
A. about B. at C. to D. from
答案： D.
26. It's time for our lesson. Stop _______.
A. playing B. to play C. plays D. played
答案： A. stop doing sth,“停止做某事”；stop to do sth, “停下来，做某事”。
27. Help yourself _______ some fish.
A. at B. too C. to D. on
答案： C. “随便吃点鱼”
28. Here are some pictures ________ .
A. of him B. of he C. about him D. about his
答案： A.
29. The book _______ on the desk.
A. no is longer B. no longer is C. is no longer D. no longer
答案： C. 注意no longer的位置。
30. Then we _______ around but _______ nothing.
A. looked, looked B. saw, looked C. saw, saw D. looked, saw
答案： D. look, “看”；see,“看到”。