________ you may have，you should gather your courage to face the challenge.
| A．However a serious problem |
| B．What a serious problem |
| C．However serious a problem |
| D．What serious a problem |
This naughty boy is really __________, which makes his mother upset.
| A．attractive |
| B．active |
| C．troublesome |
| D．anxious |
We prefer to measure our football team's success __________ the number of fans attending rather than the number of games won.
| A．in addition to |
| B．in terms of |
| C．in honor of |
| D．in response to |
__________ in thought, he almost ran into the car in front of him.
| A．Losing |
| B．Having lost |
| C．Lost |
| D．To lose |
__________ in 1636, Harvard is one of the most famous universities in the United States.
| A．Being founded |
| B．It was founded |
| C．Founded |
| D．Founding |
When __________, the museum will be open to the public next year.
| A．completed |
| B．completing |
| C．being completed |
| D．to be completed |