Beijing is ______ the north of Gansu and ______ the north of China.
| A．to; in | B．on; in |
| C．in; to | D．in; on |
Do you know ________？
| A．where does your father work |
| B．where your father works |
| C．does your father work where |
| D．your father works where |
In China，some of the students ________ the river to school by ropeway．
A．live
B．drive
C．cross
—Dad，why must I stop ________ computer games？
—For your health，my boy．
| A．play |
| B．to play |
| C．to playing |
| D．playing |
Thanks for ________ me to cross the road(马路)．
| A．help |
| B．helps |
| C．helping |
| D．to help |
It usually takes about ten minutes ________ to school．
| A．by bike |
| B．on a bike |
| C．to ride |
| D．ride |