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【题目】After the fun he has had during the holidays, the boy can’t ___ on his schoolwork.

A.try

B. concentrate

C. take

D. depend

【答案】B

【解析】句意:“放假玩儿了几天,这孩子没法集中精神上课。”concentrate on意为“聚精会神,集中思想”,符合语境;try on表示“试穿”,take on表示“雇用,承担,呈现”,depend on表示“依靠”

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典韦,陈留己吾人也。形貌魁梧,旅力过人,有志节任侠。襄邑刘氏与睢阳李永为雠,韦为报之。永故富春长,备卫甚谨。韦乘车载鸡酒,伪为候者,门开,怀匕首入杀永,徐出。永居近市,一市尽骇。追者数百,莫敢近。行四五里,遇其伴,转战得脱。由是为豪杰所识。

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