题目内容
15.-I sometimes call my son abroad,but it's expensive.-Why do you waste money ________ you could easily use Wechat or QQ?( )
A. | while | B. | unless | C. | until | D. | when |
分析 --我有时给我国外的儿子打电话,但是花费太贵了.
--你可以轻易地使用微信或者QQ,为什么还要浪费那个钱呢?
解答 答案:D.
when用作从属连词可以表示条件,意为"如果,既然",另如How can I get a job when I can't even read or write?如果我连读和写都不会,我怎么能找到工作呢?while表示当…的时候,unless表示让步,除非…;until表示"直到…";故选D.
点评 对于从属连词要掌握它的特殊用法,结合句意好好领会句子的意思,本题有一定的难度.
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