该错 They can't help laugh at my silly jokes

We can't understand----at poor little matchgirl.A.they laugh If you can't laugh at yourself,then who can you laugh at? Don't laugh at others when they are in -----{dangerous} He alway tells us fu6y jokes They make us laugh Because they are busy ,so they can't help us.改错 On my way to Don't laugh at( We can't laugh at him.改为被动语态是He can't be laugh at by us. Don't laugh at ________(me/I)该选哪个? I could __________understand my roommate’s jokes but I laugh I couldn't help laughing (couldn't but laugh) at the way tha You can't laugh at sb Beacuse you can't make a living by you my mouse can\'t move?help.