2. 休息时间到了，学生们一个接一个地走出教室。(one after another)

1. 噪音污染对人们的健康有很坏的影响。

(have a(an) ...effect on)

5. I wrote a letter of 　　　(complain)to the manager about the service I received.

4. The sight was so 　　　(frighten) that he stood there, unable to move.

3. The small trees grow well under the 　　　(protect) of us.

2. 　　　　(concern)about his health,I often went to see him.

1. They were 　　　(urge) in their demand.

2. Don’t think 　　　　of yourself but others.

1. The problem is 　　　　difficult for the child.

4. 　　　she has no car, she can’t get there easily.

C. too much/much too