单项选择题

A．Yawning results from fatigue or boredom.
B．Other animal yawn for the same reason as humans.
C．Animals yawn for a number of different reasons.
D．Only social animals yawn.
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单项选择题
A．As long as the Senate decides.B．As long as the President decides.C．As long as the Judiciary Committee decides.D．For lif
A．As long as the Senate decides.
B．As long as the President decides.
C．As long as the Judiciary Committee decides.
D．For lif
单项选择题
A．Friends.B．Colleagues.C．Husband and wife.D．Landlord and tenant.
A．Friends.
B．Colleagues.
C．Husband and wife.
D．Landlord and tenant.
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