If we now to protect the environment, we’ll live to regret it. A．hadn’t actedB．haven’t actedC．don’t actD．won’t act 题目和参考答案——青夏教育精英家教网—

题目内容

If we _________ now to protect the environment, we’ll live to regret it.

A．hadn’t acted

B．haven’t acted

C．don’t act

D．won’t act

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