We must keep the classroom ___________.
| A．clean | B．to clean | C．cleaning | D．cleaned |
At last, Tom made the baby ________ and began to laugh.
| A．stop to cry | B．stop crying | C．to stop to cry | D．to stop crying |
Do you think _________ should be allowed to drive?
| A．sixteen-year-old | B．seventeen-year-olds |
| C．fifteen-year-old | D．eighteen-years-olds |
Tom, your hair is too long. Would you please get your hair _______.
| A．be cut | B．to cut | C．cut | D．cutting |
－I think teenagers should not be allowed to get car licenses.
－I agree. They are not _______.
| A．serious enough | B．something serious |
| C．nothing serious | D．enough serious |
－I want to be a computer manager.
－________. I am studying computer science very hard.
| A．So am I | B．So I am | C．So I do | D．So do I |