去甲肾上腺素激动的β₁受体属于

A．离子通道耦联受体
B．细胞内受体
C．兴奋性G蛋白耦联的受体
D．抑制性G蛋白耦联的受体
E．具有酪氨酸激酶活性的受体

If you keep on doing stupid things like this, you'll get _______ someday!

A．punished

B．punishing

C．being punished

D．to punish