试题预览：

　　二、单项填空 (本大题共25 小题，每小题1 分，共25 分)

　　31. We all agree that a pair of shoes _____________a nice present.

　　A. are B. is C. were D. have

　　32. One of the wonders of the _____ world is the pyramids in Egypt.

　　A. old B. natural C. modern D. ancient

　　33. He met many problems he was going over his lessons.

　　A. before B. as soon as C. since D. while

　　34. The teacher explained the question again to make herself ________.

　　A. understand B. to understand C. understanding D. understood

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