How can school ban mobile phones completely __________ some of the parents simply don’t follow the rule?
| A．unless | B．when | C．until | D．before |
We often call Martin Luther King M.L.King .
| A．in short | B．for short | C．at short | D．to short |
Look out the traffic when crossing the road.
| A．at | B．of | C．for | D．with |
The bridge is 1000 meters length.
| A．with | B．in | C．at | D．on |
The two countries were between 1989 and 1992.
| A．peace | B．at no war | C．at peace | D．at peaceful |
---Has the train arrived?
---No, it all will be late half an hour.
| A．at | B．for | C．in | D．by |