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8.It was some time _____ I realised the fact that life had become difficult for many villages in western Europe.(  )
A.untilB.beforeC.unlessD.since

分析 過了一段時間,我才意識到對西歐的許多村莊來說,生活已經變得很艱難.

解答 答案:B 考查時間狀語從句.It was/will be+一段時間+before引導的時間狀語從句,是一個固定句型,意為:過了多長時間才…/要過多長時間才會….此句型容易與it is+一段時間+since從句混淆,注意,before的那個句型中,it后面用的是一般過去時或一般將來時,而since的這個句型中,it后面用的是一般現(xiàn)在時或現(xiàn)在完成時,表示自從since從句中的那個動作發(fā)生以來至現(xiàn)在的時間是多久.until意為"到…為止,直到…才";unless意為"除非,如果不".

點評 狀語從句由從屬連詞引導,從屬連詞在句中不充當句子成分,只起連接作用,狀語從句放在句首時,要用逗號,放在句尾時不用.弄清楚各個從屬連詞的用法,然后根據(jù)題意選擇最符合題意的選項.

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