It is easy to ________the differences between them because they have little ____.
| A．say, in style | B．say, in general |
| C．tell, in common | D．tell, in size |
Hurry up, _____ you won’t catch the early bus.
| A．but | B．and | C．or | D．so |
She _______ when I went to see her.
| A．is reading | B．have read | C．was reading | D．reads |
We won’t go to the Great Wall until the rain _______.
| A．will stop | B．stops | C．stopped | D．has stopped |
I will give the message to him __________he comes back.
| A．before | B．since | C．as soon as | D．until |
We won’t go to the Great Wall if it ___________ the day after tomorrow.
| A．won’t rain | B．is raining | C．rains | D．doesn’t rain |