单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．Playing the piano.
B．Typing.
C．Making a photocopy.
D．Taking a picture.
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单项选择题
A．would changeB．changeC．are changedD．have changed
A．would change
B．change
C．are changed
D．have changed
单项选择题
A．one anotherB．each and otherC．anotherD．others
A．one another
B．each and other
C．another
D．others
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