31. Do you know when did the world _____?
A. come into being B. come C. formed D. existed
30. The coal we use today should _____ plants and trees.
A. begin with B. start with C. commence as D. originate as
29. That's all for the party. Let's _____.
A. fall asleep B. go to sleep C. go to bed D. be asleep
28. They ____ friends since they met in Shanghai ten years ago.
A. have become B. have turned C. have been D. have grown
27. When he heard the news, his heart ______ very fast.
A. stroke B. beat C. knocked D. jumped
26. The old woman could not _____ the terrible noise, and she had to close the door and windows.
A. bear B. accept C. receive D. hold
25. --- We could have walked to the station. It was so near.
--- Yes. A taxi ____ at all necessary.
A. wasn’t B. hadn’t been C. couldn’t be D. wouldn’t be
24. The valley was _____ in sunlight, and the children were singing and jumping with joy
A. bathed B. covered C. swam D. surrounded
23. Everyone should remember it is very important to _____ the balance of nature toady.
A. get B. make C. keep D. remain
22. She always ____ her opinion ____ facts.
A. depends, on B. bases, on C. put, into D. bases, by