We are confident that the environment ________ by our further efforts to reduce pollution.
A．improvesB．will be improvedC．has improvedD．was improved
B

試題分析：句意：我們確信經(jīng)過我們減少污染的進一步努力，環(huán)境會被改善的。根據(jù)are confident我們現(xiàn)在確信， by our further efforts通過進步的努力，那環(huán)境的改善應是在將來，又因 主語environment 與謂語improve之間是被動關(guān)系，故用一般將來時的被動式。故選B。
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