题目内容
15.Mary only seems cold; you get to know her,she is nice.( )A. | but | B. | once | C. | until | D. | since |
分析 Mary只是看起来好像很冷漠;你一旦了解她,就会发现她是很善良的.
解答 答案:B.
but表示转折;until和since均可引导时间状语从句;you get to know her是she is nice的一个条件,所以本句为once引导的一个条件状语从句;故选B.
点评 once用作连词时,意为"一旦…就…",用于连接时间状语从句,相当于as soon as.
如:Once you start,you will never give up.一旦你开始了,你就不要放弃.
注意:once引导的是时间状语从句,从句要用一般现在时代替将来时.
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