6. A good diet is ________to health.　

5. My father didn’t _______ buying that apartment.　

4. I’m afraid he doesn’t ________ a sense of humor.　

3. He refused to _______ his defeat.　

2. I decided to ______ all my efforts ______ finding somewhere to live.　

　　　 用所给词或短语的适当形式填空。　

1. I phoned my mum _______ after the news.　

40. Some nature clubs are run by students aging between 12 and 25.

　　　 答案：31.surrounded→surrounding　32.away→out?　33.in→to　34.to→with　　　 35.so→as　　 36.suffered前加Having 37.had→has38.Stepped→Stepping　　　cerned→concerning　 40.aging→aged

　　　 综合提升

39. His lecture was designed to illustrate his idea concerned the influence of environment upon plants.　

38. Stepped carelessly along the street, he was knocked down by a bike.