---Where is Tom? ---I’m not sure. He _________ football on the playground.
| A．could playing | B．must be playing |
| C．might be playing | D．must playing |
—Are these buses?
—________________.
| A．Yes, these are. | B．Yes, they are. |
| C．Yes, they aren’t. | D．Yes, these aren’t |
— This is my ruler. _________ the blue pens?
— They are Helen’s.
| A．What | B．How | C．What about | D．Where’re |
I am not tidy, ________my brother is.
| A．and | B．but | C．/ | D．then |
Please call Mike _________ 235-0285.
| A．for | B．at | C．to | D．in |
What’s that ________ Chinese?
| A．with | B．to | C．in | D．at |