High interest rates _____ people from borrowing money.
| A．discourage | B．decrease | C．disturb | D．disgust |
You_____ all those calculations! We have a computer to do that sort of thing.
| A．needn’t have done | B．must not have done |
| C．shouldn’t have done | D．can not have done |
—_____I stay with you?
— Well, I would rather you_____me alone for a while.
| A．Will; leave | B．Shall; leave | C．Will; left | D．Shall; left |
Mr. Black is a careful and experienfed engineer, so he is often _____ to finish some challenging tasks.
| A．appreciated | B．approached | C．appointed | D．agreed |
China is a peace-loving country and _____no circumstances _____ first use nuclear weapons.
| A．on; will China | B．on; China will |
| C．under; will China | D．under; China will |
In the past decades, sea ice _____in the Arctic as a result of global warming.
| A．had melted | B．has been melting | C．melted | D．is melting |