问题

_________ now to protect the environment, we’lllive to regret it.

A:hadn’t acted
B:haven’t acted
C:don’t act
D:won’t act

正确答案是：

同类题型

You’d better ____ in bed. It’s bad for youreyes.

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No one ____ that to his face.

When a fire _________ at the National Exhibition in London, at least ten priceless paintings were completely destroyed.