— Did you telephone Uncle Sam our plan for the Christmas holidays on his f
arm?
—Yes, he was happy about our arrival, and he eagerly asked when .
| A．has we arrived | B．we had arrived |
| C．were we arriving | D．we were arriving |
_______ to find the book from the library, she decided to turn to her professor for help.
| A．Failed | B．To fail | C．Having failed | D．Being failed |
The Voice of China has set up a stage _______ some people can achieve their dreams.
| A．which | B．when | C．that | D．where |
In Disneyland every year, some 800,000 plants are replaced because Disneyland refused to _______ signs asking his “guests” not to step on them.
| A．put down | B．put out | C．put off | D．put up |
We don’t think the experiment is _______ failure. At least we have gained _______ experience for future success.
| A．the; a | B．a; an | C．a; / | D．/; the |
—The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?
—_______ my students have a try?
| A．May | B．Must | C．Shall | D．Will |