问题
选择题
The person in ________ charge of the program was at ________ complete loss when the incident happened.
A．不填；不填
B．
C．the; 不填
D．the; a
答案
答案：B
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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