The physics teacher told the students to observe carefully what would happen when a (n) _____ acted on the object.
| A．force | B．energy | C．power | D．strength |
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 |
______ with the size of the whole earth, the highest mountain does not seem high at all.
| A．When compared | B．While comparing |
| C．Compare | D．Comparing |