单项选择题

If Mark Twain couldn't find his ticket, ______.

A．he had to buy another one
B．he had to get off the train
C．he couldn't know where he was going
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单项选择题
When he was on the train, the conductor ______.
A．wanted to talk with him
B．knew his name
C．wanted to see his ticket
单项选择题
One day Mark Twain went to ______.
A．see a film
B．see a friend
C．see some writers
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