_________ Chicago is a beautiful city today,but_________ Chicago of the 1920s was a very dirty place.

• A、The ; the
• B、/ ;/
• C、A ; the
• D、/ ; the

57 （）

The passage implies that there are many senses we __________.

• A、can use only in emergencies

• B、may not understand at present

• C、never realize we have 

• D、do not actively use in everyday living