—Have you found out anything, sir?
—We are sure that the thief entered the house through the window instead of breaking in. You have closed the window before you left.
| A．shouldn’t | B．must | C．couldn’t | D．might |
Habits are like food we eat every day, which have both positive and negative effect our lives.
| A．in |
| B．on |
| C．to |
| D．for |
For centuries the upper classes in Britain spoke French ______ the common people spoke English.
| A．while |
| B．when |
| C．though |
| D．since |
As a matter of fact, it was the third time that we ______ your school.
| A．visited |
| B．have visited |
| C．had visited |
| D．would visit |
--- There's going to be a concert this evening and we want to go there very much.
--- The question is ______ we can get a couple of tickets.
| A．that |
| B．if |
| C．whether |
| D．weather |
People who are addicted______ drugs cannot go without them for a few hours.
| A．in |
| B．for |
| C．of |
| D．to |