问题
选择题
He accidentally________he had quarreled with his wife and then he hadn't been home for a long time.[ ]
A. let down 
B. let in
C. let off
D. let out
答案
答案：D
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He accidentally________he had quarreled with his wife and then he hadn't been home for a long time.[ ]
A. let down
B. let in
C. let off
D. let out
答案：D