2. 外语
  3. Babies often______down when they are learning to walk.

Babies often______down when they are learning to walk.

admin2015-04-28  44
问题 Babies often______down when they are learning to walk.
选项 A、drop
B、fall
C、slip
D、jump
答案B
解析 fall down“(因不小心等)跌倒，摔倒”；drop“落下，下降”；slip专指“滑倒”；jump“跳”。句意：婴儿学走路时经常跌倒。
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成人本科学位英语

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