21. – What’s the matter? You really look down.
– _________.
A. Why, I always look up to you
B. Me? I never look down upon anybody
C. I am looking for my pen on the floor D. I failed an important test
22. He is so happy ____ his father has promised to buy him an MP5 player.
A. that B. while C. which D. because
23. _________ the illegal mobile WAP sites worries many parents.
24. A. The children’s s urfing B. The children surf
C. The children surfing D. The children have surfed
