1.-wuneed to make different kinds of food

1.-wuneed to make different kinds of food
-my father is a cook.he ___help us
a.can
b,is able to
c.may
d.will
为什么?别的不能选吗?
2.l hope to ______go shopping with you on sunday]
a.can
b.must
c.may
d be able to
为什么?别的不能选吗?
3.millie is free this weekend.she___watch the game show on tv on sunday
a.ought to
b.need
c.might
d.has to
为什么?别的不能选吗?