题目内容
1.The environment will be worse and worse ________ we take action to protect it.( )| A. | unless | B. | if | C. | when | D. | since |
分析 -环境污染将会变得越来越糟,除非我们采取措施来保护它.
解答 答案:A;A.unless除非,如果不;B.if如果; C when当…的时候;D.since自从;根据句意"The environment will be worse and worse环境污染将会越来越糟"和"we take action to protect it我们采取措施来保护它"可知后者是前者的条件,而且是否定的条件,故此处用表示否定的连词,表示否定意义的假设,相当于if…not,因此用unless,除非.故选A.
点评 连词在句子中主要起联系上下文的作用,他们之间的区别就是表示逻辑关系的不同,所以在解题时先要理解上下文含义,然后根据上下文逻辑关系选择合适的连词.连词的用法都比较多,语义之间还有交叉,熟记其基本应用规则,了解其区别,注意固定搭配对象,是做好此类题型的关键.
练习册系列答案
相关题目
11._________ bad weather!There is too much rain this spring.( )
| A. | What a | B. | How | C. | What |
9.-Has Wendy handed in her application form?
-Not sure.She told me that she wanted to check again and it in soon.( )
-Not sure.She told me that she wanted to check again and it in soon.( )
| A. | will hand | B. | would hand | C. | has handed | D. | had handed |
16._____ Mary was doing her homework,her mother was cooking.( )
| A. | Because | B. | Although | C. | While | D. | If |
6.Little Tom found _____ in the fridge but some bad,awfully smelled milk.( )
| A. | everything | B. | something | C. | anything | D. | nothing |
10.I had already learnt a lot about that famous scientist I met him.( )
| A. | until | B. | before | C. | after | D. | although |