The train is to start soon and Mary hasn’t turned up． What _____ have happened to her?
| A．can | B．might | C．may | D．should |
An artist who was recently traveling on a ferry to the southern island discovereda long lost antique Greek vase.
| A． | at random | B． | by chance | C． | in turn | D． | on occasion |
Don't defend him any more. It's obvious that hedestroyed the fence of the garden even without apology.
| A． | accidentally | B． | carelessly | C． | deliberately | D． | clumsily |
He didn't selfishly keep for himself the money inherited from his uncle. Instead, he made acontribution to help the community.
| A． | commercial | B． | generous | C． | comparable | D． | profitable |
People complain that decisions to approve or deny a permit are oftenrather than based on fixed criteria.
| A． | appropriate | B． | conscious | C． | arbitrary | D． | controversial |
My uncle hasn't been able to quit smoking, but at least he has_____
| A．cut out | B．cut down | C．cut up | D．cut off |