It’s important _____ healthy. Do you think so?
| A．to stay | B．stay | C．staying | D．to staying |
The engineer was _______arrest _______murder.
| A．on; with | B．under; with |
| C．under; for | D．in; for |
It’s raining hard. We have to stay at home __________ going fishing.
| A．in front of | B．because of |
| C．in need of | D．instead of |
—Look! That man looks like Mr Green.
—It can’t be him. He _________ to America.
| A．went | B．will go | C．has gone | D．is going |
This is _______ empty bottle. But it is _______useful one.
| A．a; a | B．an; a | C．an; the | D．a; an |
When you are sleeping, you had better______ all the windows closed.
| A．don’t keep | B．not keep |
| C．not to keep | D．not keeping |