As the camera broke down __________ I used it, I ask for my money back.
| A．for the first time | B．the first time |
| C．next time | D．once |
She ____ an old friend of hers yesterday while she was shopping at the department store.
| A．turn down | B．deal with | C．took after | D．came across |
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 |