you are comfortable with them.

A. unless B. if C. until D. while

【解析】选C。考查连词辨析。句意: 如果这些单词你发音有困难, 你可以一遍遍地重复, 直到你熟练为止。unless"除非; 如果不"; if"如果"; until"直到......才"; while"当......时"。

5. -Would you come to my birthday party tomorrow evening?

-I'm afraid I　　　. I have to look after my grandparents.

A. wouldn't B. can't C. won't D. mustn't

【解析】选B。考查情态动词。Would you do. . . ? 含有说话者一定的希望, 期待对方愿意做某事, 肯定回答常用"Sure!/Of course!"等, 否定回答常用"Sorry, I'm afraid I can't. "

6. (2013·厦门梧侣中学质检)-Why did you　　　Linda's invitation, Frank?

-Because I had to go to the doctor.

A. accept　　　B. refuse　　　C. catch

【解析】选B。考查动词辨析。accept"接受"; refuse"拒绝"; catch"及时赶上; 抓住"。由答语"因为我要去看医生"可知拒绝了邀请。

7. (2013·内江中考)-　　　I finish my homework now?

-No, you　　　. Your work is over today.

A. Can't; must B. Must; don't have to

C. May; couldn't D. Couldn't; could

【解析】选B。考查情态动词。句意: --现在我必须完成我的作业吗? --不, 你没必要。今天你的工作已经完成了。must"必须", 其引导的疑问句的否定答语中用needn't或don't have to表示"不必"。

8. Thanks for your invitation, but I'm so sorry I can't go. I need to　　　my younger sister at home.

A. look at B. look up

C. look after D. look for

【解析】选C。考查短语辨析。由语境知: 我需要在家照顾我妹妹。look at"看"; look up"查找(资料等)"; look after"照料; 照顾"; look for"寻找"。

9. 　　　surprise news it is! All of us feel surprised at it.

A. How B. What a C. What D. What an

【解析】选C。考查感叹句式。感叹名词时用what引导感叹句, 感叹形容词或副词时用how引导感叹句, 句中news是不可数名词, 其前不用冠词。

10. (2013·武汉中考)-I had a pleasant weekend on the farm.

-　　　.

A. Oh, that's very nice of you