________we have enough evidence，we can’t win the case.
| A．Once | B．As long as |
| C．Unless | D．Since |
More than one high official ______ by the police since the mayor was shot dead.
| A．has been questioned |
| B．have been questioned |
| C．was questioned |
| D．were questioned |
John is the only one of the students in the class that never ______ a mistake even when it is pointed to him.
| A．admit making |
| B．admits making |
| C．admit to make |
| D．admits make |
Two-thirds of the money ______ on food and drinks for the homeless people in Japan.
| A．were spent |
| B．was spent |
| C．has spent |
| D．had spent |
Business studies ______ a skill-based subject which ______ students’ ability to use their knowledge.
| A．is; test |
| B．is; tests |
| C．are; test |
| D．are; tests |
Do you believe that there’s a ______ between smoking and heart disease?
| A．combination |
| B．occasion |
| C．connection |
| D．system |