问题补充:
We are confident that the environment by our further efforts to reduce pollution.
A. improves
B. will be improved
C. has improved
D. was improved
答案:
A. improves
(答案→)B. will be improved
C. has improved
D. was improved
解析:句意:我们确信经过我们减少污染的进一步努力,环境会被改善的。根据are confident我们现在确信, by our further efforts通过进步的努力,那环境的改善应是在将来,又因 主语environment 与谓语improve之间是被动关系,故用一般将来时的被动式。故选B。
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