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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