单项选择题

A．To defend its territories.
B．To attract the attention of other birds.
C．To warn other birds.
D．To pronounce that it has occupied the place.
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单项选择题
A．He hopes to buy the computer after three months.B．He has been saving for three months.C．The computer was delivered earlier than he expected.D．The computer he wants is not available.
A．He hopes to buy the computer after three months.
B．He has been saving for three months.
C．The computer was delivered earlier than he expected.
D．The computer he wants is not available.
填空题
When the grandchildren came, what is the first thing that my parents do
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