—Why are the lights in the teachers’ office still on?
—There ________ be some teachers working there.
| A．can | B．must | C．may | D．ought to |
Daisy is such a good daughter that she ________ most of her spare time with her parents．
| A．spends |
| B．costs |
| C．takes |
| D．affords |
The drivers must drive their cars ________ the right side of the road．
| A．on |
| B．at |
| C．in |
| D．for |
—Excuse me．Is there a post office near here？
—Yes，________ is．Go down this street and turn right．
| A．it |
| B．this |
| C．that |
| D．there |
We walk ________ the park and enjoy our meal under a tree．
| A．across |
| B．on |
| C．between |
| D．through |
All of my classmates enjoy ________ music．
| A．listen to |
| B．to listen to |
| C．listens to |
| D．listening to |