单选题_____AslipBpuzzleClossDfailure
单选题
_____
A
slip
B
puzzle
C
loss
D
failure
参考解析
解析：
at a loss for words因茫然而语塞，固定搭配，故选C。
at a loss for words因茫然而语塞，固定搭配，故选C。
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