27. ______ of the twins has been to Beijing.

A. None B. No one C. Neither D. Both

26. English is one of ______ in the world.

A. the most important language B. more important language

C. the most important languages D. more important languages

25. What he said was_________difficult for us_________understand.

A. so; that B. very; to C. too; to D. very; that

24. It has been 10 years_________the population reached five billion.

A. since B. when C. that D. before

23. I'm afraid you can't mend it. Please go and have your uncle _________.

A. to do it B. done C. done it D. do it

22. They were _________busy_________with each other_________the time.

A. too; to talk; to forget B. too; talking; to forget

C. so; to talk ; that they forgot D. so; talking; that they forgot

21. My watch has stopped. It seems that I'll go and _________this afternoon.

A. have repaired it B. to repaired C. have it repaired D. have it repair

20. The parents became_________ when they got the_________news.

A. excited; exciting B. exciting; excited C. excited; excited D. exciting; exciting

19. She became_________that she could not say a word.

A. too angry B. so angry C. such angry D. very angry

18. ---I'm afraid you've_________. I'm Lucy, not Lily. ---Oh, sorry. But you look the same.

A. made faces B. made a decision C. made a noise D. made a mistake