______ with the size of the whole earth, the biggest ocean does not seem big at all.
| A．Compare | B．When comparing | C．Comparing | D．When compared |
It rained heavily in the south,__________ serious flooding in several provinces.
| A．caused |
| B．having caused |
| C．causing |
| D．to cause |
According to the recent research, heavy coffee drinking and heart attack is not necessarily __________ and effect.
| A．reason |
| B．impact |
| C．fact |
| D．cause |
The following day she didn’t go to the club. __________, she walked her dog in a park nearby.
| A．Therefore | B．However | C．Instead | D．Besides |
In the botanical garden we can find a(n) __________ of plants that range from tall trees to small flowers.
| A．species | B．group | C．amount | D．variety |
Many animals and plants, which couldn’t __________ the sudden change of the climate, died out. Dinosaurs are one such example.
| A．add to | B．turn to | C．adapt to | D．lead to |