Recently I bought an ancient Chinese vase, _____ was very reasonable.
Some of the drivers were ______ by the police because of their good behavior in the traffic accident.
Bad habits, ______ formed(形成), are difficult to give up.
These natural parks are very important for preserving many animals, which would ______ run the risk of becoming extinct(灭绝的).
The girl didn’t know who ______ for the broken vase.
______ with the size of the whole earth, the highest mountain does not seem high at all.