单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．Mental and physical health.
B．Slim figure.
C．Quick response.
D．Proper thinking.
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单项选择题
A．The man needs to talk to his son more.B．The man’s son behaved badly in school.C．The woman has lots of reason to expel the man’s son.D．The man always shows less care to his son.
A．The man needs to talk to his son more.
B．The man’s son behaved badly in school.
C．The woman has lots of reason to expel the man’s son.
D．The man always shows less care to his son.
单项选择题
A．Flies need less sleep than humans.B．Humans need a similar amount of sleep with flies.C．The amount of human sleep is determined by certain gene.D．Flies can determine how much sleep they need.
A．Flies need less sleep than humans.
B．Humans need a similar amount of sleep with flies.
C．The amount of human sleep is determined by certain gene.
D．Flies can determine how much sleep they need.
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