19．be of + n. 替换adj.

　　 The products are of high quality (very good ) and are sold everywhere in China.

18．set aside替换save

　　 Some students think that they should set aside some of their pocket money for books. (2004天津卷)

17．come up with替换think of

　　 Jack is very clever. He often comes up with ( thinks of ) new ideas.

16．have a ball替换have a good time/ enjoy oneself

　　 After visiting the workshop, we went back to school. Every one of us had a ball ( had a good time ).

15．come to light替换discover

The family were so pleased when they discovered the lost jewels. →

The family were so pleased when the lost jewels came to light.

14．round the corner 替换 coming soon/ nearby

　 　① The summer vacation is round the corner ( coming). Do you have any plans?

② Li Ming studies in a school round the corner (nearby).

13．contribute to替换　 be helpful/useful

Plenty of memory work is undoubtedly helpful to English study. →

　　 Plenty of memory work will undoubtedly contribute to English study.

12．cover替换walk/read

　　 After covering (walking) 10 miles, we all felt tired.

11．due to替换because of

He arrived late due to ( because of ) the storm.

10．on替换as soon as

　 As soon as he arrived, he began his research. →

　 On his arrival, he began his research..