问题标题:
Weareconfidentthattheenvironment________byourfurthereffortstoreducepollution.A.hadbeenimprovedB.willbeimprovedC.isimprovedD.wasimproved
问题描述:

Weareconfidentthattheenvironment________byourfurthereffortstoreducepollution.

A.hadbeenimproved B. willbeimproved

C.isimproved D. wasimproved

刘蔚琴回答:
  B
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《Weareconfidentthattheenvironment________byourfurthereffortstoreducepollution.A.hadbeenimprovedB.willbeimprovedC.isimprovedD.wasimproved|小学英语问答-字典翻译问答网》
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