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______how to do the work several times,but he still doesn't kown how to do the work.
A l have shown him B having been shown 为什么选A?主语不应该一致吗?难道是因为有连接词BUT吗?
人气:405 ℃ 时间:2020-03-24 16:30:40
解答
是因为but, but前后连接两个小分句,都应该有主谓结构
如果没有but ,就应该选B,作he still does't know how to do the work 的状语从句
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