-Mom.may I surf the Internet now?-No. you have finished doing all your homework．( )A．unlessB．ifC．because 题目和参考答案——青夏教育精英家教网—

题目内容

18．-Mom，may I surf the Internet now？
-No， you have finished doing all your homework．（　　）

A．

unless

B．

C．

because

分析 --妈妈，我现在可以上网吗？
--不，除非你完成你的所有作业．

解答答案：A；
A．unless除非；B．if；如果；C．because因为；
根据句中信息No，you have finished doing all your homework，推知该句句意：不，除非你完成你的所有作业；表示除非相当于if…not，条件状语从句，故选A．

点评细读所提供的选项，认真分析它们的不同含义，然后在理解句意把握语境的基础上，选择正确的答案．

练习册系列答案

9．昨天．她没赶上公共汽车，只好步行回家．
Yesterday shemissedthe bus andhadto walk home．

6．Sam prefers playing football to watching movies on TV．（保持句意基本不变）
Samwouldratherplay football than watch movies on TV．

13．Paris is the capital of France as Beijing is that of China．

3．-Can your father drive？
-Yes，and he usually ____________ me to school．（　　）

10．Mr．White can always make us relaxed．He is _________ teacher I have ever met．（　　）

	A．	the most humorous		B．	most humorous
	C．	the more humorous		D．	a humorous

7．Nancy is a good student．She studies hard _______ she also likes to help others．（　　）

8．-It's time for class．
-OK．I will ______ my toys at once．（　　）

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