Physical Education in schools can teach us endurance — something we all need ______ life becomes tough.
A．unlessB．in caseC．thoughD．until
B

試題分析：unless除非；in case以防；though盡管；until到……為止。句意：學校中的體育能教給我們?nèi)棠土�，忍耐力是當我們在生活中遭遇困境時所必須的東西。
點評：本題難度適中。判斷從句中用哪個連詞，需用記住連詞的用法，在句中的作用，連詞也是高考的熱點，需要考生平時多練習。需要考生會分析句子成分理解句意。
即學即練：I won't go to the party ____ I'm invited.
A. unless           B. in case          C. though           D. until
解析：A。句意：除非我被邀請，否則我不會去參加晚會的。
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