It’s time that we ______ firm measures to protect our environment.A、have takenB

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问题 It’s time that we ______ firm measures to protect our environment.

选项 A、have taken
B、took
C、are taking
D、will take

答案 B

解析虚拟语气题。在It is(high／about)time(mat)…后面应跟虚拟语气，通常用过去时，故B正确。

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