Daniel is busy these days. I doubt he will come to my birthday party or not this Sunday.
| A．that | B．when |
| C．how | D．whether |
--Now most teenagers write to each other not by letter ________online.
--Yes, the Internet has become a part of their life.
| A．or | B．and |
| C．but | D．so |
—Our head teacher says we should have more sleep these days.
—I don’t agree with his idea __________ he might be right.
| A．if | B．although |
| C．unless | D．because |
— Amanda, hurry up! The bus is coming!
— Oh, no. We mustn’t cross the street the traffic lights turn green.
| A．if | B．after |
| C．until | D．because |
My friend’s plane had taken off I got to the airport to see him off.
| A．until | B．while |
| C．after | D．before |
We started climbing the hill in the early morning we could watch the sunrise.
| A．as if | B．so that |
| C．in order to | D．such that |
Put on your coat, you will catch a cold.
| A．and | B．but |
| C．or | D．so |
Study hard, ______ you’ll pass the exam.
| A．because | B．before |
| C．but | D．and |
_________ I could think of an answer, the teacher asked someone else.
| A．Because | B．As |
| C．Before | D．After |