He was ______ to find that it was almost impossible to undertake the task.
| A．cast off | B．cast out | C．cast away | D．cast down |
You have been sitting on my hat and now it is badly out of______。
| A．date | B．shape |
| C．order | D．balanee |
Always read the_______on the bottle carefully and take the right amount of medicine.
| A．explanations | B．instructions |
| C．descriptions | D．introductions |
At the meeting they discussed three different_______to the study of mathematics。
| A．approaches |
| B．means |
| C．methods |
| D．ways |
He was chosen _________ of the company.
| A．manager | B．a manager | C．the manager | D．as a manager |
In the botanic garden we can find a（n）______of plants that range from tall trees to small flowers.
| A．species | B．group | C．amount | D．variety |