1.It's rported that it may be several years () it's possible

1.It's rported that it may be several years () it's possible for each family in
China to own at least one car.
A before B after C because
2.--Mr Wu has been to Amy's home this morning?
--No,he () ,because he didn't know her address.
A can't B couldn't C mustn't 选哪个选项 请说明理由 并翻译