问题
选择题
A railway station is not a place for a child to be ________ at night. [ ]
A. left alone
B. let alone
C. settle in
D. settle down
答案
答案：A
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A railway station is not a place for a child to be ________ at night. [ ]
A. left alone
B. let alone
C. settle in
D. settle down
答案：A