小测验：选择正确的单词

1. masked ball
   化装舞会,假面舞会
   

1. People in the north wear masks in winter.
   北方人冬天戴口罩
2. Three masked bandits stuck up a bank yesterday.
   三个蒙面盗匪昨天抢劫了一家银行。
3. He preserved his mask of solemnity even with acquaintances.
   他甚至和熟人交往也保持着一本正经的面孔。
4. Two masked men sprang out flora behind a tree.
   两个蒙面人突然从树后边冒了出来。
5. They were held captive by masked gunmen.
   他们被蒙面的持枪歹徒劫持了.

　1个形容词解释