—Why did you stop writing? — I my writing paper.A. have used up ofB. have been used up C.

—Why did you stop writing?
— I my writing paper.
A. have used up of
B. have been used up
C. ran out of
D. have run out

A. have used up ofB. have been used up (答案→)C. ran out ofD. have run out解析：考查固定词组的用法。Use up sth=run out of sth用完sth;或者 sth run out; A多了of; B多了been; D少了of.应该选择C。

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