读图，完成问题。
图中，①、②、③、④四个地段中平均坡度最大的为
| A．① | B．② | C．③ | D．④ |
海拔低于400米的区域面积约为
| A．0.05km2 | B．0.5km2 |
| C．5km2 | D．50km2 |
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 |
— What is that building?
— _____ the garden equipment is stored.
| A．There is in which | B．That is where |
| C．The building that | D．That I got |