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

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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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