不属于儿茶酚胺类的药物是

A．肾上腺素

B．去甲肾上腺素

C．异丙肾上腺素

D．多巴胺

E．麻黄碱

—Where's his baseball?

—I ________ know. [ ]

A. am not

B. don't

C. isn't

D. aren't