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Battery-operated slippers are used ______ seeing in the dark.


  1. A.
    to
  2. B.
    as
  3. C.
    by
  4. D.
    for
D
试题分析:to到,对于;as由于,作为;by通过;for为了。句意:电动拖鞋被用来在黑暗中看见东西。For后接名词性短语,表示原因,故选D。
考点:介词辨析
点评:英语介词的一个特点是一词多义,并且介词间语义交叉现象很多,习惯用法也很多,有时很难从词义上区分开来。故学习中要注意不断总结,结合语境结合基本词义多记一些介词的习惯用法和固定搭配。
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