Thelittlechildwasnoticed________th

发布时间：2020-07-27 05:39:56

The little child was noticed ________ the tall tree．A.risk climbingB.risking to climbC.to risk climbingD.to risk to climb

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C解析notice sb．do sth．变被动后为：sb．is noticed to do sth．。risk后只能接动名词，不接不定式作宾语。
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