问题

Why does the lake smell terrible?— Because large quantities of water ____.
A:have polluted
B:is being polluted
C:has been polluted
D:have been polluted
B:is being polluted
C:has been polluted
D:have been polluted
正确答案是:
同类题型
I have ______ much homework to do every day that I can spend no time watching TV.
Hardly could Tom _____ this amount of homework in such a short time.
.Putting down he receiver, he__________his umbrella and made for the door.
ften do you go to the concert —- ______________,but at least once a month.
If I ________ your advice then, I think that the crops could be growing better.