2017届高考英语外研版一轮复习课时作业：必修3 Module4《Sandstorms in Asia》（含答案）

　　课时作业16　Module 4　Sandstorms in Asia

　　一、单元扣点

　　Ⅰ.根据句意，用所给单词或短语的适当形式填空

　　forecast　chemical　desertification　cycle　frightenmajor　scary　urge　experience　protect

　　1．The sand storm that occurred several weeks ago was among the most ________.

　　2．________ is one of the causes of sandstorms.

　　3．Another big sandstorm ________ in today's weather report.

　　4．________ in a real sandstorm is quite dangerous.

　　5．Nowadays people use too many ________ in their life, which is bad for the environment.

　　6．The doctor ________ me to have an X­ray test, and then, he could make a conclusion.

　　7．Hundreds of thousands of people died in the ________ earthquake in Tangshan in 1976.

　　8．My brother is an ________ traveler while I seldom travel.

　　9．We must take measures to ________ our rivers from being polluted.

　　10．What a great ________ you have given me!

　　答案　1.frightening　2.Desertification　3.has been forecast　4.To cycle　5.chemicals　6.urged　7.major　8.experienced　9.protect　10.scare

　　Ⅱ.完成句子

　　1．树吸收二氧化碳，释放氧气。

　　Trees ________ carbon dioxide and ________ oxygen.