Some people thought ________ possible to live on out space in the future .
| A．it | B．it be | C．it is | D．that is |
Not until he called the secretary three times ______ that the manager went to an important meeting.
| A．did he tell | B．he told | C．was he told | D．he was told |
Duncan, ______ NBA star, is one of _______ few basketball players who are very popular to many of his Chinese fans.
| A．an; the | B．an; a | C．the; the | D．the; a |
-----They say Tom’s brother is a billionaire.
----_____________? He wouldn’t accept any help from his brother, even though it was offered.
| A．What if | B．What for | C．So what | D．Forget it |
Oct. 1st, ____ is our National Day, is celebrated with singing and dancing.
| A．which | B．as | C．when | D．that |
Up to now, large quantities of food ____ to Africa to save the starving people.
| A．is sent | B．has been sent | C．have been sent | D．are sent |