自然流产的主要病因是（）。

A．基因异常

B．孕妇接触有毒物质

C．子宫畸形

D．宫颈内口松弛

E．妊娠心脏病

–Shall we go to the movie tonight?

--No, I’d rather ___ at home with our baby. You’d better not leave it to the babysitter at night.

A．you stayed

B．you stay

C．stayed

D．stay