Once he ______ his mind, nothing can be done to ________ his mind.
| A．made up; change | B．has made up; change | C．changed; make up | D．has changed; make up |
Because they usually receive the same score in the exams, there’s often disagreement as to ______ is the better student, John or Mary.
| A．whom | B．which | C．that | D．what |
Some of the drivers were ______ by the police because of their good behavior in the traffic accident.
| A．examined | B．questioned | C．praised | D．punished |
Bad habits, ______ formed(形成), are difficult to give up.
| A．and | B．once | C．for | D．but |
These natural parks are very important for preserving many animals, which would ______ run the risk of becoming extinct(灭绝的)．
| A．otherwise | B．other than | C．therefore | D．in another way |
The girl didn’t know who ______ for the broken vase.
| A．will be blamed | B．blamed | C．was to blame | D．blames |