1.---（ ） is your cousin in?

1.A = what's class：what is class:“班级是什么”,显然不对.
B = what classes:“哪些班级.”题中是cousin,单数,B显然不对.
D = how class:“怎么班级”,这选项……谁选谁二~哈哈.
C = what class:“哪个班级”.当然对了~:D
2.换个动词来说：what did you want( ).添doing的话……第一个did是过去时,然后如果第二个用正在进行时的话,在此文中,不对.
A is right.