问题

As is known to us all, under no circumstances______ temporary economic development at the expense of the environment and resources.

A:should we seek
B:we should seek
C:we had sought
D:had we sought

正确答案是：

同类题型

Though most people know that smoking ________ the risk of cancer, it is still hard for them to give it up.[ ]

William, as well as his friends，________invited to my birthday party the day before yesterday.

What did you say just now— I asked you .

The Browns had the house painted brown when they moved in,____________?

in the chimney for five hours,the thief looked very pale and tired