In the past few years, sea ice ____ in the Arctic as a result of global warming.
| A．had melted | B．has been melting | C．melted | D．is melting |
If trees continue _______ at the present rate, it won’t be _______there is no trees for shade.
| A．to cut down; long before |
| B．being cut down; before long |
| C．to be cut down; long before |
| D．cutting down; before long |
Remember never to lie to others; if you did, you would have to ______ more lies to cover the lies you have______ .
| A．discover; told | B．make up.; told |
| C．invent; said | D．find out; spoken |
He finally gave in to and opened the letter addressed to his wife.
| A．worry | B．feeling | C．curiosity | D．hope |
Any student cheats in the exam will never it.
| A．who; get along with | B．that; get back with |
| C．who; get away with | D．which; get in with |
We agreed to meet at 10 at the bus stop，but he________so far.
| A．didn’t turn up | B．hasn’t turned up |
| C．didn’t turn off | D．hasn’t turned off |