第一节：语法和词汇知识（每小题1分，满分20分）
21. He convinced me ______ the difficulty of the work.
A. on B. at C. for D. of
22. People often use plastics to ______ wood or metal.
A. in place of B. take their place C. take the place of D. instead of
23. _____ with the size of the whole earth, the biggest ocean does not seem big at all.
A. Compare B. Comparing C. Compared D. To compare
24. The reason _______ his going to Britain was ______ he got a new job there.
A. for; because B. for; that C. of; because D. of; that
25. He ______ persuade his father to give up smoking but his father didn’t.
A. managed to B. succeeded in C. tried to D. kept in
26. --- You should have thanked her before you left.
--- I meant ______, but when I was leaving, I couldn’t find her anywhere.
A. to do B. to C. doing D. doing so
