選擇A
這里考察的是反義疑問句
因為前面是have caused這個完成時,而且是肯定,所以后面部分應(yīng)該是否定的,而且是havn't they,選擇A
Plastic bags have caused serious environmental pollrtion,____ A haven't they B have they
Plastic bags have caused serious environmental pollrtion,____ A haven't they B have they
C don't they
D do they
C don't they
D do they
其他人氣：487 ℃時間：2020-04-07 01:24:39
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