问题

Why does the lake smell terrible— Because large quantities of water _________.

A:was not done
B:is being polluted
C:has beenpolluted
D:have beenpolluted

正确答案是：

同类题型

What about_____________—That’s a good idea,

China made its firm ____ to cut carbon emissions in 2009.

’t got the reference book yet, but I’ll have a test on the subject nextmonth—Don’t worry You______ have it by Friday

She has lots of good for every .

She got up early this morning _________ she could catch the first bus.