问题

Every possible means ________ to prevent the air pollution，but the sky is still not very clear.

A:were using
B:have used
C:has been used
D:was used

正确答案是：

同类题型

All the students are looking forward _______ Nie Haisheng and Fei Junlong.

you think I really _____ the bad handwriting in your composition at yesterday’s meeting—Sure, Why _____ you always pick holes in everything I write

It _____ he _____ his office.[ ]

“在中国传统教育里，最重要的是‘四书’，”一句中“四书”指的是（）

I see no reason why they shouldn’t go on playing for another four or five years __ they are fit enough.