该图为某地等高线图。读图完成2～4题。
对图中各地地形的正确叙述是
| A．①为山脊 | B．②为鞍部 |
| C．③为陡崖 | D．④为山谷 |
图中陡崖顶部的海拔高度可能为
| A．40m | B．45m | C．55m | D．65m |
P、Q两地的相对高度
| A．不少于10m | B．不超过10m |
| C．可能为5m | D．不可能为15m |
_____ China’s reform and opening up in late 1978, its quick development has aroused worldwide attention, which has made America anxious about it.
| A．When | B．As | C．While | D．Since |
Mr Smith, of the speech, started to read a novel.
| A．tired; boring | B．tiring; bored |
| C．tired; bored | D．tiring; boring |
Whenever I met him, _____ was fairly often, I like his sweet and hopeful smile.
| A．what | B．that | C．which | D．when |
All of us still remember the terrible earthquake that Tangshan twenty years ago.
| A．attacked | B．struck |
| C．knocked | D．exploded |
The College Entrance Examination near, so you should be prepared for it.
| A．is drawing | B．draws |
| C．drew | D．has drawn |