几道英语的语法题,请帮我讲解清楚,1、（ ）I teach _____ Chinese and they teach _

几道英语的语法题,
请帮我讲解清楚,
1、（ ）I teach _____ Chinese and they teach _____ English.
A.their,my B.they,my C.them,I D.them,me
2.( ) --Where is Wuhan?--It's _____Hebei.
A.to B.on C.in D.at
3.( )Can you _____ it in English?
A.say B.talk C.speak D.talk to
4.( )Tom likes _____ to the movies with his friends and ______ sports.
A.going,playing B.go,play C.going,play D.go,playing