Mary was caught in a traffic jam and by the time she arrived at the airport her father’s plane_______.
| A．took off |
| B．had already taken off |
| C．was take off |
| D．had already been taken off |
– The kidnapped American captain was rescued from the Somali pirates（海盗）.
-- But for the help of the US Navy, he _______ freed then.
| A．may not be | B．wouldn’t have been |
| C．wouldn’t be | D．mustn’t have been |
– Do you know why the river was polluted?
-- Many different factors ___________ the serious pollution of the river.
| A．contributed to | B．adjusted to | C．were accustomed to | D．were attached to |
Chinese Premier Wen Jiabao, in_________ interview with Hong Kong reporters on April 13, said that Chinese economy in ________ first quarter showed signs of better than expected positive changes.
| A．an, 不填 | B．the, the | C．the, a | D．an, the |
We recommend he ____ this dictionary.
| A．buy | B．buys | C．buying | D．to buy |
With no one to_______ in such a frightening situation, she felt very helpless
| A．turn to | B．turn on | C．turn off | D．turn over |