Follow the directions on the bottle carefully when _______.
| A．you will take the medicine | B．taking the medicine |
| C．to take the medicine | D．taken the medicine |
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 |
---Poor Tom! He will have to work all the next month.
---Luckily, the basketball games are held.
| A．except | B．except that | C．except when | D．except for |
I like traveling by sea it is not rough.
| A．unless | B．in case | C．as long as | D．although |
---Has the train arrived?
---No, it all will be late half an hour.
| A．at | B．for | C．in | D．by |