问题

The scientists recommend that studies ________ to find out what side effects the medicine might cause.

A:be done
B:should do
C:will be done
D:are done

正确答案是：

同类题型

______interesting the book is!—Yes.I have read it twice.

下列句中加点字古今意义都相同的一项是（）

Help me carry this box to my office , will you —- ______________ .

I don’t know____. But I know ______name. A.her,her B. him, him C. his,his D. you, you

There somany foreigners in the streets these days.– They might be runners in the Yellow River Estuary (入海口，河口) International Marathon.