He________go out with his parents，but now he________staying at home alone．
A．used to；is used to
B．is used to；used to
C．use to；is used to
—Henry，you________tell the teacher if you want to go out of the classroom．
—Sorry，sir．
A．are supposed to
B．are surprised to
C．are afraid to
Don’t ask him to study too late into the night．________，he is only a small child．
| A．As a result |
| B．After all |
| C．Best of all |
| D．For example |
Animals are our close friends．We are supposed________them．
A．to protect
B．protecting
C．protect
We________six days a week，but we only work five days now．
| A．used to work |
| B．used work |
| C．used to working |
| D．use to work |