问题补充：
We are confident that the environmentby our further efforts to reduce pollution. (·辽宁，30)
A. had been improved
B. will be improved
C. is improved
D. was improved
答案：
A. had been improved
(答案→)B. will be improved
C. is improved
D. was improved
解析：
考查时态。根据we are confident和by our further efforts可知，环境得到改善应该是将来的事情，故用一般将来时的被动语态。
如果觉得《We are confident that the environmentby our further efforts to reduce pollution. (·辽宁》对你有帮助，请点赞、收藏，并留下你的观点哦！
