1. 在下列个句中的空白处填入一个适当的词，或用括号中所给词的正确形式填空：

1. （1） The teacher, together with some of her students, (be) preparing for their performance now.

3. （2） It is dangerous to carelessly throw about (light) cigarettes like this.

5. （3） He made every effort to seek a position  he could get a higher salary and a quick promotion.
   

7. （4） The doctor left hurriedly without a word and came back after  seemed to be half an hour.
   

9. （5） It made us overjoyed to hear that he is  (admit) into Beijing University.
   

11. （6） Do you see the sign over there? They don't allow (take) photos here.

13. （7） Great achievements (make) in the field of medicine in the past ten years, and people are enjoying better medical care now.

15. （8） It is widely accepted that honesty is the best policy. At  time should we cheat in exams.
    

17. （9） You shouldn't expect too much from them. all, they are just beginners.

19. （10） The building that (build) there is for us teachers, so though there is much noise all the time, we still feel happy.

21. （11） Little Johnny has gone hiking with three of his friends and his mother was (terrible) concerned about his safety.

23. （12） Great attention should be paid to (protection) the endangered animals because when we lose some species, we will put ourselves in danger.

25. （13） Human facial expressions differ from those of animals in the degree which they can be controlled on purpose.

27. （14） Jenny have been there at that time because she was here with me all day yesterday.

29. （15） With all his attention (fix) on what he was reading, he didn't notice them slip into the room.