29. All the people should try their best to stop the environment from ______.

　　 A. polluting　　 B. polluted　　　　 C. being polluted　 D. pollute

28. Each time _______ I catch a cold, I have pain in my stomach.

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

27. He ______ his parents that he has failed in the exam.

　　 A. dares not tell　　　　　　　　　 B. dares not telling

　　 C. dare not tell　　　　　　　　　　 D. dares not to tell

26. Most people ______ a television set _____ a necessary piece of furniture.

　　 A. look; as　　　 B. look; to be　　 C. look on; as　　 D. look on; to be

25. She ___　 on the desk all the books she was carrying and ____ down for a rest.

　　 A. lay; lay　　　 B. laid; laid　　　 C. lay; laid　　　 D. laid; lay

24. Did you find a ____ old woman _____ on the ground when the door was broken open?

　　 A. dead; lay　　 B. dying; lied　　 C. dead; lied　　　 D. dying; lying

23. When I got there, the traffic lights ______, so I had to stop.

　　 A. turned to red B. turned red　　 　C. turning to red　 D. turning red

22. The problem will be _______ discussed at the meeting tomorrow.

　　 A. further　　　 B. farther　　　　 C. more　　　　　　 D. less

21. --Did _____ of your parents come to see you last week?

　　 -- _______ of them came to see me.

　　 A. any; none　　 B. any; Neither　　 C. either; Neither D. either; Any

20.Let Harry play with your toys as well, Clare. You must learn to _____.

　　 A. support　　　 B. care　　　　　　 C. spare　　　　　 D. share