题目内容
8.The danger of heart disease increases 20% for one hour a day spent watching televsion.( )A. | for | B. | to | C. | in | D. | by |
分析 每天花一小时看电视心脏病的危险就会增长20%.
解答 答案是D.本题主要考查介词辨析.for对…来说;为了,因为;to (表示动作或情感的对象)对于;到,向;给,予等;in 在…里面;在某一段时间内;用…语言等;在…方面;by 由,被;在…旁边;通过,凭借;increase by(上涨了…);注意比较increase to表示"上涨到…"; 英语中表示"上涨或下降"的词都常常与to/by连用:强调最后的结果用"to"表示"上涨或下降到…";强调变化的差距用"by",表示"上涨或下降了…"; 根据句意和介词搭配判断,选用increase by 表示变化差距"上涨了20%",所以答案选择D.
点评 介词辨析要在掌握各介词的基本用法和固定搭配的基础上结合语境做出符合逻辑、常理的推测.
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