5. I keep in touch with many of my　 p 　　　classmates after leaving school.

4. The stepmother’s b 　　　towards Lily shows that she likes her very much.

3. Students should pay more attention to the reading c 　　　and writing in their English learning.

2. What impresses me most is the friendly and e 　　　　attitude Danny has towards all the customers.

1. We are surprised that Professor Watson is leaving a 　　　world to take a job in industry.

8. 在habit后加of9. √10. on→to

6. his→their7. much→little

4. when→that5. travelled→travelling

3. 去掉back或return→turn/come　　

20. 解析：选A。参考上题解析。