they had to work day and night. ____they____ ____work day and night?
we should keep our rooms clean to fight the flu.
____should we____to fight the flu?
You should keep away from crowded places.
You___ ___to the crowded places.
人气:435 ℃ 时间:2019-10-17 03:14:28
解答
Did ...have to
What.do
shouldn't go
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