Experts have been warning _____ of the health risks caused by passive smoking.

   A. at a time   B. at one time   C. for some time   D. for the time

C


解析:

for some time 意為“一段時(shí)間”，因?yàn)橹^語(yǔ)用了現(xiàn)在完成進(jìn)行時(shí)，所以要用for some time，表示從過(guò)去的某個(gè)時(shí)候開(kāi)始一直延續(xù)到現(xiàn)在的一段時(shí)間內(nèi)，專(zhuān)家一直警告說(shuō)被動(dòng)吸煙引起健康危急。at a time意為“每次,在某時(shí)”；at one time意為“同時(shí),曾經(jīng)”；for the time意為“暫時(shí)”。

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科目：高中英語(yǔ) 來(lái)源：江西省高安中學(xué)09-10學(xué)年高一下學(xué)期期中考試（英語(yǔ)） 題型：閱讀理解

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B. To see if they interested in playing.
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科目：高中英語(yǔ) 來(lái)源：江西省0910學(xué)年高一下學(xué)期期中考試（英語(yǔ)） 題型：閱讀理解

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A. Panksepp spoke highly of the new research.

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72. What would be the best title for the passage?

A. Ape study explores evolution of laughter.

B. Apes like to laugh when being tickled.

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