题目内容
They were surprised that a child should work out the problem _____ they themselves couldn’t.
- A.when
- B.where
- C.until
- D.while
D
考查连词辨析。while是个并列连词,表示“转折”,而其它连词均没有转折之意。
考查连词辨析。while是个并列连词,表示“转折”,而其它连词均没有转折之意。
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