Greenland, ＿＿＿＿＿island in the world, covers even two million square kilometers.
| A．it is the largest | B．that is the largest | C．is the largest | D．the largest |
33. There's no light on - they______ be at home.
| A．can't | B．mustn't | C．needn't | D．shouldn't |
32. 一You were brave enough to raise objections at the meeting．
一 Well, now I regret_________ that．
| A．to do | B．to be doing | C．to have done | D．having done |
31. The chair looks rather hard，but in fact it is very comfortable to________.
| A．sit | B．sit on | C．be sat | D．be sat on |
30. Wang Tao was made_______ the dishes for a week as a punishment．
| A．to wash | B．washing | C．wash | D．to be washing |
29. When I handed the report to John，he said that George was the person______．
| A．to send | B．for sending | C．to send it to | D．for sending it to |