Whilewewererunningontheplayground,Jacksuddenlystopped
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問題詳情:
While we were running on the playground, Jack suddenly stopped _______ and lay on the ground, so we all stopped______ what was wrong with him.
A. to run; to see B. to run; seeing
C. running; seeing D. running; to see
【回答】
D
知識點:動詞和動詞短語
題型:選擇題
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