Hestartstohelphertocarrythebox,

发布时间：2020-07-27 05:14:17

He starts to help her to carry the box, but trips ________ his shoes．A.toB.overC.onD.with

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B解析trip over…被……绊倒．例如：She tripped over a big stone on her way to school．昨天在上学的路上她被一个大石头绊倒了．
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