题目内容
【题目】Mary works very hard because she doesn't want to in her lessons.
A.fall down
B.fall back
C.fall over
D.fall behind
【答案】D
【解析】句意:Mary工作很努力因为她不想在功课上落下。fall down”落下来“;fall back”退却,后退“;fall over”摔倒,跌倒“;fall behind”落在后面“。根据句意可知应选D。
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