sometimes , often , usually , always , hardly ever , never(选词填空)

sometimes , often , usually , always , hardly ever , never(选词填空)
1.I ______ go to school by bike,but ________ I go by bus.
2.It is too dark here,so I ______ see you.
3.My grandpa is _______ telling me the story.Maybe it's because he is too old.
4.I like sports.I ______ do some running in the morning.
5.America is so far from China .I have _______ been there.