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题型：单选题题类：模拟题难易度：困难

北京市石景山区2018届高三下学期英语第一次模拟考试试卷

If the traffic so heavy, I could have been back by 6 o'clock.

A、hadn't been B、wasn't C、couldn't be D、hasn't been

举一反三

Had the governments and scientists not worked together , AIDS-related deaths _______ since their highest in 2005.

— I'm worried about the sports meet. Do you think it will be postponed?

— If it _______ rain tomorrow, but actually the weather forecast has removed our worry.

Thank you for your timely help; otherwise we in great trouble now.

Grace doesn't want to move to New York because she thinks if she there, she wouldn't be able to see her parents very often.

no modern telecommunications, we would have to wait for weeks to get news from around the world.

________ for his timely help, I wouldn't have been able to make it through the economic squeeze.

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