单项选择题

A．They cannot sleep well.
B．They cannot eat well.
C．They tend to bite each other.
D．They tend to reproduce more.
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单项选择题
A．The unsmiling faces.B．The sun.C．The residents.D．The weather.
A．The unsmiling faces.
B．The sun.
C．The residents.
D．The weather.
单项选择题
A．Walk the dog.B．Clean the house.C．Go to the doctor’s.D．Finish her assignment.
A．Walk the dog.
B．Clean the house.
C．Go to the doctor’s.
D．Finish her assignment.
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