________ the earth to be flat, many feared that Columbus would fall off the edge of the earth.
| A．Having believed | B．Believing |
| C．Believed | D．To believe |
Rather than __________ on a crowded bus, he always prefers __________ a bicycle.
| A．ride； ride | B．riding； ride | C．ride；to ride | D．to ride;ride |
—What are you mailing, Ryan?
—A textbook __________ a new method of teaching physics. I want my friends to take a look at it.
| A．is based on |
| B．based on |
| C．basing on |
| D．which based upon |
He __________ the game and __________ lots of experience.
| A．won ； won | B．beat ； won | C．won ； gained | D．earned ； gained |
__________，the com-pass was first made in China.
| A．It is known to all |
| B．It is known |
| C．We all know |
| D．As is known to all |
Jim is known __________ the police __________ a criminal.
| A．to； as | B．to; for | C．for； for | D．for； as |