问题
选择题
Mr Li has some trouble sleeping, so dinking a glass of milk before going to bed every night is his common_____．
A．practice
B．knowledge
C．experience
D．duty
答案
答案：A
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Mr Li has some trouble sleeping, so dinking a glass of milk before going to bed every night is his common_____．
A．practice
B．knowledge
C．experience
D．duty
答案：A