问题
选择题
He spent too much time talking on ______ phone while we were all busy at _____ work.
A．the, 不填
B．a, 不填
C．不填, 不填
D．the, the
答案
答案：A
选 A。on the phone 和 at work 均为习语，其中一个带冠词，一个不带冠词。
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