单项选择题

By the end of the trip, Mary（）more than 3,000 miles.

A. traveled
B. will have traveled
C. have been traveled
D. have been traveling

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（）traveling expenses rising a lot, Mrs. White had to change all her plans for the tour.

A. Since
B. As for
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While（）the novel, I didn't think I would identify with the characters in it.

A. read
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