We should put away all medicines out of reach of children and make sure they are not left ________.
| A．lie round | B．laying around |
| C．lain round | D．lying around |
the end of last term, every student in the school, I think, has taken at least five maths tests.
| A．By | B．Since | C．From | D．In |
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 |
The oil must be used up, the light went out.
| A．for | B．because | C．since | D．as |