用所给词的适当形式填空。

1.Have you had any         (experience) of teaching English?

2.The way to        (succeed) is not a smooth one.

3.No one can deny the        (important) of keeping the rules of school.

4.It takes pains and patience to         (achievement) one's goal.

5.They are much more        (reality) about its long term commercial prospects.

有关诊断妊娠的方法中哪项是正确的：

A．尿妊免(+)则可确诊妊娠

B．B型超声波检查时只要看到胎囊即可诊断妊娠，看到胎心搏动即可诊断活胎

C．HCG放免测定法用于诊断早孕是不敏感的

D．超声多普勒法，在孕妇下腹部听到吹风样声音可确定妊娠

E．胎心听诊器只能用于听胎心而听不到胎动