扣缴义务人每次代扣的税款，应当自代扣之日起( )日内缴入国库，并向所在地的税务机关报送扣缴企业所得税报告表。
A．3
B．5
C．7
D．10
参考答案：C
Must I take the medicine every day?
-No, you __________.[ ]
A. must
B. mustn't
C. needn't
D. can't
