专升本考前英语单选练习题及答案

　　1.With more forests being destroyed, huge quantities of good earth _________ each year.

　　A. is washing away

　　B. is being washed away

　　C. are washing away

　　D. are being washed away

　　【精析】D

　　2. By the end of next year, I______for the company for 15 years.

　　A. had worked B. will work C. have worked D. will have worked

　　【精析】D 根据句中的时间状语By the end of next year(到明年年底)可知,本句应用将来完成时,即谓语动词应用"will/shall have+过去分词"的形式,表示持续到将来某一时间的动作。故选D。

　　3.Many young people like to try exciting things, running the______of hurting themselves.

　　A. danger

　　B. risk

　　C. interest

　　D. comment

　　【精析】B run the risk of (doing) sth.为固定搭配,意为"冒着(做)……的危险"。danger：危险,be in danger of意为"有……的危险";interest：兴趣,业余爱好;comment：议论,评论,常与介词on或about搭配。故选B。

　　4.His car couldn't start, so he got out to see______there was no gasoline in his car.

　　A. how

　　B. why

　　C. if

　　D. what

　　【精析】C 分析句子结构可知,空处引导一个宾语从句。从句成分完整,但缺少"是否"的含义,所以应用if(是否)引导。how：如何,在宾语从句中作方式状语;why：为什么,……的原因,在宾语从句中作原因状语;what：什么,在宾语从句中作主语、宾语等成分。故选C。

　　5. An air brake is_________the power of compressed air to stop a wheel from tumning.

　　A. a brake that uses

　　B. a brake used to

　　C. what any brake is used for

　　D. that brake is used for

　　【精析】A 该题主要考查定语从句，that 充当从句主语，横线后句子完整，故选A。