17. —What should we pay more attention to if we go north in winter, Mum?

—Nothing much. Take warm clothes _____    

   the weather is cold.

A. as long as      B. now that

C. if              D. in case

19. Mr Smith,       of the      speech, started to read a novel.

A. tired; boring     B. tiring; bored

C. tired; bored      D. tiring; boring

      In some cities it is very difficult to have a telephone _____ , and people have to wait a long time before they can get a phone.

        A. assembled      B. installed      C. equipped     D. repaired

The coffee is wonderful ! It doesn’t taste like anything I _______ before .

A．was having       B．have       C．have ever had      D．had ever had

_______environmental issues, the government will enforce existing regulations.

A. Regards        B. As          C. For          D. As regards

One of the few things you __   _ say about English people with certainty is that they talk a lot about the weather.

A. need    B. must    C. should   D. can

— Tom is never late for work. Why is he absent today ?

— Something _______ to him.

A. must happen                     B. should have happened

C. could have happened              D. must have happened

25. I ______ have been more than six years old when the accident happened.

A. shouldn’t        B. couldn’t       C. mustn’t         D. needn’t

John’s pale face suggested that he ______ill, and his parents suggested that he ______a medical examination.

A. be, should have   B. was, have   C. should be, had    D. was, has

26. He directed exposure to pigs,otherwise he_______pig flu.

   A. couldn’t get         B.wouldn’t have gotten  C.couldn’t have got   D.woud get