下列各句中，表达得体的一句是（ ）

You can hardly imagine the trouble the woman had ________ her children. [ ]

My class teacher is very good _____ us, and we love her very much.

Where are you going for your winter vocation—– We _______ go to Hainan, but we are not sure.

Though he is _____ at home, but he doesn’t feel ______