单选题
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
【正确答案】
C
【答案解析】
[解析] 文中提到马克•吐温说他必须找到车票，不然的话他将不知道去哪儿。
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