—Which one can I take?
—You can take ________ of them；I’ll keep none.
| A．both | B．any |
| C．either | D．all |
— ____ sweep the classroom yesterday？
—I was playing tennis with my friend．
| A．Why not | B．Why didn't | C．Why don't | D．Why didn't you |
He didn’t _____ to the news.
| A．answer | B．reply | C．react | D．hear |
In the Great Depression, the American government couldn’t find good solutions _____ the unemployment problem.
| A．of | B．to | C．on | D．about |
In January, 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
| A．it marked | B．marking | C．marked | D．to mark |
The speech by the mayor of Shanghai before the final EXPO 2010 is strongly impressed ____ my memory.
| A．to | B．over | C．by | D．on |