问题

If we had taken such effective measures much earlier, the river___ soseriously now.

A:is not polluted
B:would not be polluted
C:had not been polluted
D:would not have been polluted

正确答案是：

同类题型

_______ you have seen both fighters, ______will win?

I think classical music is pleasant.—_______ I think it’s boring.

How did you go home after the party last night?—Well, there were no buses________we had to walk[ ]

I’ve got many books on Chinese food. You can borrow _____ if you like.

Tom ____ the CD player for two weeks