题目内容
-How amazing it is that astronauts are exploring outer space!
-It’s a challenge, I guess, _________man against nature.
-It’s a challenge, I guess, _________man against nature.
| A.of | B.for | C.by | D.about |
A
应答句中的I guess是插入语,因此所填介词与challenge连用,表所属,用of,选A。
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