I have some tickets for the basketball match. I wonder _____.
| A．where you buy the tickets | B．why you like to go there |
| C．when you watch the match | D．if you'd like to come along |
—Always look around________you cross the street，David．
—OK，I know，Mom．
A．until
B．before
C．unless
She looked at me________disbelief when I told her the news．
| A．with |
| B．on |
| C．in |
| D．for |
Keep________till you see the light，then turn right．
| A．walk |
| B．to walk |
| C．walked |
| D．walking |
The children decide________ their schoolyard this Friday afternoon．
| A．clean |
| B．to clean |
| C．cleaning |
| D．cleaned |
After all the students took their seats，the headmaster________．
| A．show up |
| B．show off |
| C．showed up |
| D．showed off |