中国石油大学 / 中石油
正确率：100%
10. We walked ______ whole day that day; however, by 5:30 we had only covered ______ quarter of the distance.
A、the; a
B、a; the
C、the; the
D、a; a
A、the; a
B、a; the
C、the; the
D、a; a
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