You'd better _____ outside. It's raining.[ ]

A. go                    

B. not go

C. not going              

D. don't go

白喉患者恢复期带菌时间长的原因有（）

A.注射疫苗

B.伴咽峡炎

C.伴链球菌感染

D.伴慢性扁桃腺炎

E.单用抗毒素治疗