一个对象和另一个对象之间，通过消息来进行通信。消息通信在面向对象的语言中即方法定义。
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According to the text, how many marriages did Charlie Chaplin have?
A. One.
B. Two.
C. Three.
D. Four.
What does “it” in the sentence “It was no wiser a marriage, however, than his first had been” refer to?
A. His last marriage.
B. His second marriage.
Charlie Chaplin.
D. Lita Grey.
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