1. 用所给单词的适当形式填空

1. （1） This is one of(busy) underground stations in London.  

3. （2） There will be a (school-leaver) party next week.

5. （3） —And now, better (go) to hospital . —All right.

7. （4） He watched his things (careful) and said nothing.  

9. （5） We need three(step) to finish this work.  

11. （6） She had an important meeting that afternoon . So she had to take an earlier(fly).

13. （7） I agree with your idea (exact).

15. （8） I will be here as long as Lily (come) by six.  

17. （9） I am looking forward to (pass) the exam.

19. （10） Today is my father's (forty) birthday party.

21. （11） My mother always makes me (look) after my little sister.

23. （12） We have plenty of time (catch) the train.

25. （13） They have difficulty(work) out the math problem.

27. （14） We are(surprise) at what he said.

29. （15） It is wonderful (tour) the streets of the city.