It snowed heavily for three days and they were separated from the outside world.
| A．in the end | B．on end | C．by the end | D．at the end |
If our marketing plan succeeds, we _______ the sales by thirty percent next year.
| A．would increase | B．will increase |
| C．would have increased | D．will be increasing |
Supposing you _________ the lottery, what would you do with the money?
| A．would win | B．have won | C．had won | D．won |
Children’s brains cannot develop properly _________ they lack protein.
| A．because | B．since | C．when | D．unless |
Afraid __________? This type of anxiety can deeply disturb people’s enjoyment of social relationships.
| A．of laughing at | B．to be laughed at |
| C．of being laughed at | D．being laughed at |
Experts and teachers all think that failure is not _____ a bad thing to some extent.
| A．greatly | B．necessarily | C．definitely | D．fully |