John said that he didn’t quite _______ and asked me to repeat what I had said.

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问题 John said that he didn’t quite _______ and asked me to repeat what I had said.

选项 A、snatch up
B、summon up
C、catch on
D、watch out

答案C

解析 动词短语辨析。A.snatch up抓住某物;B.summon up 鼓起(勇气等);C. catch on理解,明白;D. watch out当心,监视,注意。根据句意应选C。句意为:约翰说他不太明白,要我再说一遍。
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