Question

It was some time _____ I realised the fact that life had become difficult for many villages in western Europe.

A．until

B．before

C．unless

D．since

Answer 1

B 

試題分析：句意：過了一段時(shí)間，我才意識(shí)到對(duì)西歐的許多村莊來說，生活已經(jīng)變得很艱難。It was/will be + 一段時(shí)間 + before引導(dǎo)的時(shí)間狀語從句，是一個(gè)固定句型，意為：過了多長(zhǎng)時(shí)間才……/要過多長(zhǎng)時(shí)間才會(huì)……。此句型容易與it is +一段時(shí)間+since從句混淆，注意，before的那個(gè)句型中，it后面用的是一般過去時(shí)或一般將來時(shí)，而since的這個(gè)句型中，it后面用的是一般現(xiàn)在時(shí)或現(xiàn)在完成時(shí)，意：自從since從句中的那個(gè)動(dòng)作發(fā)生以來至現(xiàn)在的時(shí)間是多久。