The lake is ______polluted so the number of the fish____.

问题描述:

The lake is ______polluted so the number of the fish____.
A.so ,is declining B.such,is declined
C.too,has been declined D.very ,are declined

选A 因为the numeber of 后的谓语动词用单数形式 排除D
so+adj, such +a/an+adj.+n.排除B C