问题
单项选择题
Please leave the key under the door（）you go out.
A.in case
B.in the case
C.in case of
D.in the case of
答案
参考答案：A
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Please leave the key under the door（）you go out.
A.in case
B.in the case
C.in case of
D.in the case of
参考答案：A