With more traffic problems arising, more strict rules have been set, which makes it difficult for people to succeed __________the driving test

A．to pass

B．passing

C．to have passed

D．to be passed

在易致新生儿窒息的母亲因素中，包括哪项（）

A.母有全身疾病如糖尿病，心肾疾病等

B.母有产科疾病如妊高症，前置胎盘等

C.母多胎妊娠

D.母妊娠早期反应较重

E.母年龄大于35岁或小于16岁