Plastic bags have caused serious environmental pollrtion,____ A haven't they B have they

分类: 作业答案 • 2022-01-01 11:43:31

问题描述：

Plastic bags have caused serious environmental pollrtion,____ A haven't they B have they
C don't they
D do they

答

选择A
这里考察的是反义疑问句
因为前面是have caused这个完成时,而且是肯定,所以后面部分应该是否定的,而且是havn't they,选择A