________he can't understand is ________his son doesn't like the school.He is very upset about this.
| A．That；why | B．Why；that |
| C．What；why | D．Whether；that |
There is plenty of rain in the southeast, there is little in the northwest.
| A．because | B．therefore | C．while | D．as |
Don’t leave the water while you brush your teeth.
| A．run | B．running | C．being run | D．to run |
We arrive at six. But I’m sorry we are late.
| A．should | B．were supposed to | C．must | D．ought to |
Only to use this reading room. Students have another room on the second floor.
| A．are the teachers allowed | B．are allowed the teachers |
| C．the teachers are allowed | D．the teachers allowed |
The police will have to the room for fingerprints.
| A．check | B．examine | C．clean | D．analyze |