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英语
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they are on a vacation ,这句话对吗
人气:192 ℃ 时间:2020-06-23 19:20:13
解答
应该是on vacation,不用a,牛津
字典
上有类似的例句.有a 就错了吗?嗯,on vacation 是固定短语,所以不能加个a 。
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