1.Victor ------- be at home because I saw him back several m

1.Victor _______ be at home because I saw him back several minutes ago
A.must B.has to C.can D.needs to
2.I think _______is very necessary for us to take a gift to Julia's birthday party
、、好歹也讲解一下吧、说说知识点
直接炒个答案有什么用啊