Some people get in touch with each other by mobile phones__________ others keep contact with each other by e-mail.
| A．when | B．before | C．while | D．since |
However hard I tried, I just couldn’t ________ them of the truth of my story.
| A．remind | B．convince | C．rid | D．inform |
Practising Chinese kung fu can not only ________ one’s strength, but also develop one’s character.
| A．bring up | B．take up | C．build up | D．put up |
Yesterday, I met my old friend ________, which gave me a big surprise.
| A．in return | B．on purpose | C．by chance | D．in case |
— You were brave enough to raise objections at the meeting.
— Well, now I regret ________ that.
| A．to do | B．to be doing | C．do | D．having done |
With food, water and electricity ________, the villagers suffered a lot after the earthquake.
| A．cut down | B．cut up | C．cut off | D．cut in |