问题

In order to find the missing child, villagers _____ all they can over the past five hours.

A:did
B:do
C:had done
D:have been doing;

正确答案是：

同类题型

He does help others, but he always expects returns ____. As a result, nobody will accept anything from him.

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____ do you eat junk food— I like it. I eat it three times a week.

What do you think of the new English teacher?—___she is an elegant lady, she can be extremely difficult to work with．