My parents have promised to come to see me before I _______ for Africa.
| A．have left | B．leave | C．left | D．will leave |
33. Great honors will be given to ______ have successfully rescued the victims of the earthquake.
| A．those who | B．whoever |
| C．who | D．Whom |
32. The traffic problems we were looking forward to seeing ______ should have attracted the government’s attention.
| A．solving | B．solve |
| C．to solve | D．Solved |
31. The decision ______ Internet addiction（成瘾）as a mental disorder has caused much debate.
| A．to classify | B．classifying |
| C．being classified | D．to be classified |
30. As we watched the panda, we stood still, ______ to one another.
| A．dared hardly to whisper | B．hardly daring to whisper |
| C．dared not to whisper | D．not dared whisper |
29. Contrast may make something appear more beautiful than it is when ______ alone.
| A．seen | B．to be seen |
| C．being seen | D．having been seen |