单项选择题

A．About every five minutes.
B．about every six minutes.
C．About every seven minutes.
D．About every eight minutes.
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单项选择题
A．The woman has trouble getting along with the professor.B．The woman regrets having taken up much of the professor’s time.C．The woman knows the professor has been busy.D．The woman knows the professor has run into trouble.
A．The woman has trouble getting along with the professor.
B．The woman regrets having taken up much of the professor’s time.
C．The woman knows the professor has been busy.
D．The woman knows the professor has run into trouble.
单项选择题
A．Because it did not shoot far.B．Because it did not bend easily.C．Because it was too heavy.D．Because its string was short.
A．Because it did not shoot far.
B．Because it did not bend easily.
C．Because it was too heavy.
D．Because its string was short.
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