Unit 4 Global warming reading课时作业

第一节　单项填空(共15小题；每小题1分，满分15分)

　　从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

　　1．Billy is good，kind，hardworking and intelligent. ________，I can't speak too highly of him.

　　A．In a word B．By the way

　　C．On the whole D．As a result

　　答案　A

　　解析　in a word总之，表示对上文的总结。

　　2．One Friday，we were packing to leave for a weekend away ________ my daughter heard cries for help.

　　A．after B．while C．since D．when

　　答案　D

　　解析　when引导时间状语从句。句意为"一个周五，我们正在打包准备度周末，这个时候我女儿突然听到求救声"。

　　3．It is clear that in modern society high ________ and demands are placed on teachers.

　　A．motivations B．expectations

　　C．standards D．opportunities

　　答案　B

解析　demands与expectations对应。motivation动机；standard标准；opportunity机会。句意为"很明显在现代社会，教师被赋予