The person in charge of the program was at complete loss when the incident happened.A. 不

发布时间：2020-08-17 09:54:33

The person in      charge of the program was at      plete loss when the incident happened.
A. 不填；不填
B.
C. the; 不填
D. the; a

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A. 不填；不填
(答案→)B.
C. the; 不填
D. the; a
解析：答案：B。 in charge of固定短语“负责任”；at a loss 固定短语：“茫然不知所措”。
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