选择 ()is the winner in your class?A.What B.Where C.How D.Who

选择 ()is the winner in your class?A.What B.Where C.How D.Who
Thank you very much.
()A.That's OK B.That's all right.C.Not at all D.You have welcome
Amy ()the NO.3 bus to the zoo.A.by B.bys C.take D.takes
句子 Happy birthday to you!(做出答句）
麻烦说选择题说一下为什么选那个答案,好人一生平安.