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单选题 24. We are confident that the environment ________ by our further efforts to reduce pollution.

A

had been improved

B

will be improved

C

is improved

D

was improved

正确答案 :B

解析

本题考查动词时态语态。
句意为“我们很自信,通过我们进一步的努力来减少污染,环境将会得到改善。”由句意可知,应该用一般将来时的被动语态,故B项为正确答案。