问题

Every possible means _ been taken to prevent the river ___

A:have; polluting
B:has; polluted
C:has; from being polluted
D:have; being polluted

正确答案是：

同类题型

There’s a hole in his ______, so we can see two of his fingers.

The children are made ______ lots of homework every day．This makes them ______．

The door opened and there

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50. A doctor was___________when Mother fellill.