One evening when it was SO warm，I stayed awake on purpose until half past eleven in order to have a good look at the moon by myself．

问答题Every new thought or idea has to be connected to what we already know. Unfortunately, it is easy to limit the possibilities of a new idea by connecting it to only one area of our previous knowledge. Great thinkers are aware of this and try to combine new and old ideas in as many different ways as possible. They also try to make connections that may seem strange at first. By comparing and connecting ideas and objects in new ways, creative thinkers are able to think of new applications and solutions. Many of the things that we use every day were invented by someone who saw similarities between his or her ideas and objects or systems in the world.

单项选择题The story happened in a ().

A．school
B．toy store
C．cinema
D．computer room

单项选择题21().

A.flowers 
B.drinks 
C.clothes 
D.tickets

单项选择题According to the author, the United States claims to be a nation .

单项选择题Why did Mary feel regretful