单项选择题

"Maria has blisters in her boots." "She ______ walking such a long distance."

A．was used not to
B．used to
C．is not used to
D．did not used to
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单项选择题
Once you become a soldier, you will be given a monthly ______ by the army.
A．income
B．allowance
C．wage
D．salary
单项选择题
Although ______ Spanish, he attended the course.
A．he was knowing
B．he is knowing
C．having a knowledge of
D．knows
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