问题

Has it been warned that all the children in this area stayat their homes until the Flu has been controlled

A:does
B:did
C:had done
D:has done

正确答案是：

同类题型

So what is the procedure? — All the applicants ______ before a final decision is made by the authority

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____ have known the truth, or shewould have told us

Jim, please look at these two photos, who arethey—–In the ______ photo, these are my friends,Cindy and my cousin, Bill. In the _____ photo, they are my cousin’s friends.