问题
选择题
We are confident that the environment________by our further efforts to reduce pollution. (2013·辽宁，30)
A．had been improved
B．will be improved
C．is improved
D．was improved
答案
答案：B
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。