在市场上购买衣服时，你看到的表示“中”号的字母代表是( )
| A．S | B．L | C．M | D．XL |
My uncle has taught in this school he was twenty years old.
| A．since | B．for | C．until | D．after |
一have you been in the sports club?
—Since the first month I came to the school.
| A．How old | B．How long |
| C．How much | D．How soon |
—Have you finished your homework?
—Yes . I it just now.
| A．finish | B．finished |
| C．have finished | D．will finish |
The workers have worked for ten hours. They want to stop a rest.
| A．have | B．to have |
| C．having | D．had |
When he arrives at the bus stop, the bus for 20 minutes.
| A．has left | B．had left |
| C．has been away | D．had been away |