题目内容
54.The monument was built in honor of the explorer who was believed ________ the river.|
A. to have discovered |
B. to have been discovered |
|
C. to discover |
D. having been discovered |
答案:A
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| 题目考察动词不定式的完成式——表示不定式中的动作发生在谓语动词表示的动作之前
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