题目内容
2.Modern science has found that _______ one is using chopsticks,over 30joints and over 50muscles are used,which is a favorable stimulation to the brain.( )
A. | since | B. | although | C. | unless | D. | while |
分析 现代科学发现,当一个人正在使用筷子时,30多个关节和50多块肌肉被使用,对大脑是个有利的刺激.
解答 答案:D.此处while one is using the chopsticks为时间状语从句,根据主句可知此处需要"当…时候"的连词,故填while当…时候.A.since自从,B.although尽管,C.unless除非.
点评 本题考查连词的用法.学生需对主从句之间的关系来选择合适的从属连词.
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