We should protect the environment, for plenty of fresh air ________ to good health.
| A．adjust | B．contributes | C．distributes | D．attributes |
All possible means ____, but nothing can prevent the buildings ____.
| A．has tried; from being pulled down |
| B．have tried; from pulling down |
| C．has been tried; from pulling down |
| D．have been tried; from being pulled down |
Gun control is a subject _________ Americans have argued for a long time..
| A．of which | B．with which | C．about which | D．into which |
Such a grammar mistake is _____ among the beginners of English study.
5.
| A．regular | B．ordinary | C．general | D．common |
Knowledge and learning are important if we want to be successful, but they may also ______ our thinking.
| A．direct | B．limit | C．change | D．improve |
--- We can give you a ride into town.
--- ________ Thank you.
| A．Yes, why not? |
| B．Oh, it would be my pleasure. |
| C．Oh, that would be great. |
| D．Yes, please. |