We are confident that the environmenr       by our further efforts to reduce pollution
A．had been improvedB．will be imrovedC．is improvedD．was improved
B.
句意：我們相信我們進(jìn)一步減少污染的努力將會(huì)改善環(huán)境狀況。根據(jù)題干中主句是將來(lái)時(shí)，還有空后的further判斷此處應(yīng)用將來(lái)時(shí)。
【考點(diǎn)定位】考查時(shí)態(tài)和語(yǔ)態(tài)。
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