1.（ ）do you need?------some masks,please.a.else what b.what else c.what else

1.（ ）do you need?------some masks,please.a.else what b.what else c.what else
2.（ ）me,please.
a.listening b.listen c.listen to
3.they are going ( ) for a halloween party.
a.to buy things b.buy things c.buying things
4.-------what are you doing?-------I ( )
a.am doing my homework b.do my homework c.will do my homework