请教这英语几道题为什么要这样做?谁能帮我讲解一下.1）You’d better go upstairs and tell me children not to make so much noise.A go; not to B go；don’t C to go; not go D to go; don’t 2) It’s too late.Why not go now?A not to go B not going C not go D don’t; go 3)---Did the teacher tell you what to do this afternoon?----Yes.We’ll go to visit the Science Museum.A to go where B how to do C what to do D to do what 4) Meimei went to help Kate with her Chinese.A help B to help C helped

请教这英语几道题为什么要这样做?谁能帮我讲解一下.
1）You’d better go upstairs and tell me children not to make so much noise.
A go; not to B go；don’t C to go; not go D to go; don’t
2) It’s too late.Why not go now?
A not to go B not going C not go D don’t; go
3)---Did the teacher tell you what to do this afternoon?
----Yes.We’ll go to visit the Science Museum.
A to go where B how to do C what to do D to do what
4) Meimei went to help Kate with her Chinese.
A help B to help C helped D helping
5) Would you please not to drop your shoes on the floor at night?
A not to B not C don’t D won’t