单项选择题

What do we learn about the man

A．He saw the big tower he visited on T
V．
B．He has visited the TV tower twice．
C．He has visited the TV tower once．
D．He will visit the TV tower in June．
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单项选择题
What are the speakers mainly discussing
A．The man does research for his chemistry paper．
B．The way to use a computer can affect one’s eyes．
C．Why does the man need new glasses
D．The computers are useful for research．
单项选择题
According to the passage，a pacing device______．
A．is used to time a student’s reading speed
B．is not used in most speed reading courses
C．is used as an aid to vocabulary learning
D．should be used whenever we read alone
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