If we now to protect the environment, we’ll live to regret it.A．hadn"t a
题型：不详难度：来源：
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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答案
| C |
解析
| 考查时态。根据if主句的一般将来时态可知从句应使用一般现在时态，且有now作为现在时态的标志词，故选C。 |
举一反三
When I first met Bryan I didn’t like him, but I my mind.| A．have changed | B．change | C．had changed | D．would change |
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The driver wanted to park his car near the roadside but was asked by the police .| A．not to do | B．not to | C．not do | D．do not |
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At the last moment, Tom decided to a new character to make the story seem more likely.| A．put up | B．put in | C．put on | D．put off |
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The sunlight is white and blinding, hard-edged shadows on the ground.| A．throwing | B．being thrown | C．to throw | D．to be thrown |
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The girl ____black hair ____a red sweater.| A．has; has | B．has; wears | C．with; in | D．with; wears |
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