问题

The flu is believed ______ by viruses that like toreproduce in the cells inside the human nose and throat

A:sent for
B:sent out
C:sent back
D:sent away

正确答案是：

同类题型

My friend is ______her sister.

So far, I haven’t adapted to the fast of the life in Toronto.

by keeping down costs will Power Data hold its advantage over othercompanies.

Can he __________ English

Dale is studying in_______university and he wants to be______engineer.