—Wow,your picture looks splendid!
—I______it on my computer.
| A．drew | B．draw |
| C．will draw | D．had drawn |
The field research will take Joan and Paul about five months;it will be a long time_____we meet them again.
| A．after | B．before | C．since | D．when |
My parents live in a small village. They always keep candles in the house ___ there is a power cut.
| A．if | B．unless | C．in case | D．so that |
It is difficult for us to learn a lesson in life _____we’ve actually had that lesson.
| A．until | B．after | C．since | D．when |
____fire, all exits must be kept clear.
| A．In place of | B．Instead of | C．In case of | D．In spite of |
—Where’s that report?
—I brought it to you ____you were in Mr. Black’s office yesterday.
| A．if | B．when | C．because | D．before |