躯体性原因（）
A．4～12mg
B．5～12mg
C．10～20mg
D．15～40mg
E．50～120mg
参考答案：A
—Thank you for your gift. It’s useful for me.
— ________
A．I’m sorry to hear that.
B．I’m glad you like it.
C．That’s all right.
D．Really?
