He spent too much time talking on phone while we were all busy at work.A. the, 不填B. a, 不

发布时间：2020-08-17 14:57:10

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

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(答案→)A. the, 不填
B. a, 不填
C. 不填, 不填
D. the, the
解析：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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