20. ______ medical science, we can expect to live to a good old age.

A. As for                                 B. According to

C. Instead of                              D. But for

21. Suddenly the chair caught fire. The boys quickly ______ the fire with water and an old coat.

A. suppressed                             B. wiped out

C. destroyed                              D. put out

22. Our plan ______ unexpected opposition from the retired workers.

A. came to                                B. came by

C. ran over                                D. ran into

23. The small family business ______ a company of international importance.

A. grew into                              B. broke into

C. ran into                               D. made into

24. Professor Wang is a person you can ______ for advice.

A. turn up                                B. turn into

C. turn to                                D. turn down

25. Standing up to empty your basket gives you a chance not only to ______ your back, but to look at the scenery.

A. stretch                                B. raise