20. Every minute is made _________of __________ our lessons well.

A to use; study　　　　 B use; studying　　 C use ; to study　　　 D used; study

19. When first_______ to the market, these products enjoyed great success.

A introducing　　　　 B introduced　　　 C introduce　　　　 D being introduced

18. Whom would you rather ________the work?

A to have to do　　　　　　　　　　　　　 B to have do

C have to do　　　　　　　　　　　　　　　 D have do

17. If we want to succeed we must _______what we do and who we are.

A believe in　　　 B believe　　　　 C trust　　　　　 D believe about

16. He is said 　　　　　　a new computer program recently ,but I don’t know he will finish it .

A design　　　　　 B to be designed 　　　C to have designed　　　 D to have been designing

15. ---- Did you remember to give Mary the money you owed her?

---Yes, I gave it to her 　　　　　　I saw her.

A while　　　　　　 B the moment　　　 C suddenly　　　　 D once

14. I was so disappointed to find my car 　　　　　.

A break up　　　　　　 B break into　　　　　 C break out　　　　　　 D break down