单项选择题


A．when
B．or
C．but
D．if
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单项选择题
A．during the timeB．on timeC．all the timeD．all that time
A．during the time
B．on time
C．all the time
D．all that time
单项选择题
______ these trains to Beijing would you like to take
A．What are
B．With what
C．Which of
D．What of
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