题目内容
【题目】He had to walk faster to keep the other visitors.
【答案】up;with
【解析】句意:他必须走的更快以赶上其他游客。keep up with固定短语,“赶上”,因此答案为up,with。
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题目内容
【题目】He had to walk faster to keep the other visitors.
【答案】up;with
【解析】句意:他必须走的更快以赶上其他游客。keep up with固定短语,“赶上”,因此答案为up,with。