题目内容：

They （not come）back yet.I think they will com
They （not come）back yet.I think they will come back in an hour.

优质解答

haven't came They haven't came back yet.I think they will come back in an hour.他们还没有回来,我猜想他们一个小时之内会回来的. yet可以看出来是过去完成时态,所以要用到haven't came 来填空


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