问题

The new examination system has to be _______ in special regions before it can be applied nationwide.[ ]

A: put out
B: experimented out
C: tried out
D: taken out

正确答案是：

同类题型

It often rains in that areaPlease take an umbrella with you—________

I would appreciate _____ , to be frank, if youcan take care of my pet dog.

Will you ____ it that my birds are looked after well while I’m away?

If the chair is too high you can_____ it tosuit you.

How long can I _____ the book–Three weeks.