单项选择题

A．Because she has changed the appointment twice before.
B．Because she is free only at that period of time.
C．Because she has got a toothache all day.
D．Because her dentist will be busy at other periods.
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单项选择题
A．you do physical exercises late in the day.B．you have sleeping pills.C．your heart rate increases.D．you rest frequently during the day.
A．you do physical exercises late in the day.
B．you have sleeping pills.
C．your heart rate increases.
D．you rest frequently during the day.
单项选择题
According to Paragraph 5 ,Saudi Arabia is
A．too slow to implement any reform.
B．going to be overthrown.
C．able to develop fast.
D．so traditional that it cannot make any changes.
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