Jenny short, curly, blond hair.[ ]
A. have
B. is
C. has
答案：C
____you stepped into the lab with your shoes on? You are supposed to take them off before you enter it.
A．How come
B．How about
C．How dare
D．How long
上呼吸道感染的主要治疗方法是（）
A.抗病毒治疗
B.抗炎治疗
C.免疫疗法
D.注射疫苗
E.对症疗法
