The scientists were waiting to see the problem . A. settleB. to settle C. settledD. settl

发布时间：2020-08-17 14:13:35

The scientists were waiting to see the problem     .
A. settle
B. to settle
C. settled
D. settling

网友回答

A. settle
B. to settle
C. settled
D. settling
解析： 在感官动词see后面用过去分词作宾补，表示“看到……被……”。
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