David felt ________of the foolish thing he had done in the classroom.
| A．shameful | B．ashamed | C．shamed | D．shaming |
Mr. Brown was sentenced to 10 years’ imprisonment（监禁） for ______ murder.
| A．practicing | B．confirming | C．performing | D．committing |
There is some doubt ____ the sick schoolboy can join in the English evening party on Sunday.
| A．/ | B．whether | C．that | D．which |
---- How long ____ at this job?
---- Since 1990.
| A．were you employed | B．have you been employed |
| C．had you been employed | D．will you be employed |
___ I know he will stay here for half a year.
| A．as soon as | B．as long as | C．so far as | D．as well as |
_____ the government agrees to give extra money , the theatre will have to close.
| A．Until | B．Unless | C．Since | D．While |