It takes him twenty minutes ________ the museum.
| A．takes a bus | B．to take a bus to |
| C．by bus | D．by bus to |
—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 |
— Could you tell me ______?
— Yes. It’s next to the supermarket.
| A．where the post office is |
| B．where was the post office |
| C．where is the post office |
| D．where the post office was |
— Did you see Dr Ma yesterday afternoon?
— No. When I got to his office, he ______ already.
| A．left | B．has left |
| C．was leaving | D．had left |