_____were you there?only four days.填什么呢?
people show their love to their mothers ____giveing gifts on Mother'sDay A to B by C at Dfor选择什么呢?
人气：331 ℃ 时间：2020-01-14 13:06:35
解答
_How long____were you there?only four days
选B 通过某种方式(手段) 用介词by 后面接动词的ing 形式
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