题目内容
5.─There's a sign over there.What does it say?─It says we are not allowed to enter the exhibition ______ we have a ticket.( )
| A. | if | B. | when | C. | unless | D. | because |
分析 ─那儿有一个告示牌,上面说什么?
-它说,我们是不允许进入展览馆的,除非我们有一张票.
解答 答案:C;if如果;when当…的时候;unless除非;because因为;根据句意"we are not allowed to enter the exhibition我们是不允许进入展览馆的"和"we have a ticket我们有一张票",可知二者之间在逻辑上是相矛盾的,故此处用表示否定的连词,因此用unless,除非,相当于if…not,意为如果我们没有一张票,我们是不允许进入展览馆的;故选C.
点评 根据语境,细读选项,认真分析选项之间的异同,选择正确的答案.
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