【題目】Today, when scientists examine mummies, they wear special clothing for protection _____ they breathe in harmful gas.

A. even though B. in case C. until D. unless

【答案】B

【解析】

試題分析：考查連詞。A. even though即使；B. in case以防；C. until 直到；D. unless除非；句意：今天，當(dāng)科學(xué)家檢查木乃伊?xí)r，他們會(huì)穿著特殊的衣服來(lái)進(jìn)行保護(hù)為的是以免呼吸到有毒的氣體。根據(jù)語(yǔ)境可知選B項(xiàng)。

考點(diǎn) : 考查連詞

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