Climbing Mount Everest great skills and not without risk.
| A．requires；are | B．required；were | C．requires；was | D．requires；is |
A study shows that students living in non-smoking dorms are less likely to the habit of smoking.
| A．make up | B．pick up | C．draw up | D．turn up |
Much to his surprise，he invited only twenty friends to the dinner，but came．
| A．twice as many as | B．as many as twice | C．twice as many | D．twice more than |
Faced with trouble or difficulty，a person takes help that is available．
| A．whatever | B．whenever | C．wherever | D．however |
_____ for more than three months, but he did his best to catch up with his classmates.
| A．Being ill | B．Having been ill | C．Though he was ill | D．He was ill |
the world economy is in difficulty, we can see, the people of China are full of hope．
| A．As；不填 | B．Because；which | C．Though；as | D．With；不填 |