（单词翻译:单击）
Unit 1 时态、语态(三)
7. By the end of the year all but two people ______.
A. have left
B. will leave
C. will be leaving
D. will have left
8. By the end of this month, we surely _____ a satisfactory solution to the problem.
A. have found
B. will be finding
C. will have found
D. are finding
9. A thief who broke into a church was caught because traces of wax, found on his clothes, _____ from the sort of candles used only in churches.
A. had come
B. coming
C. come
D. that came
答案：
7. D
译文：到今年年底，除两人之外，其他人都将离开。
本句是将来完成时的用法。
8. C
译文：到本月底我们肯定能找到一个满意的解决问题的办法。
本句是将来完成时的用法。
9. A
译文：闯入教堂的贼被抓住了，因为在他的衣服上发现留有蜡痕，而这种蜡痕只有在教堂中有。
本句是过去完成时的用法。过去完成时主要表示过去某时或某动作之前业已完成的动作或情况，即表示“过去的过去”。这是一个主从复合句，从上下文来判断，从句的动作(留有蜡烛的痕迹)发生在主句动作(抓住)之前，故应用过去完成时，表示过去的过去。
