I guess you know what's best for the family and for me.
我猜想你们一定知道怎样做对整个家庭和我是最有利的。
When did you arrive?
你什么时候到达?
I'm not sure. I ought to do some studying, as I've got masses of work to do, but I think I'll be too tired. Maybe I'll just watch the news on television and go to bed early.