请选择DCBA/})X1a6p9h8W-b5A+h8y Tomorrow is my _________ birthday.5U:{8K/a'i9^(}:j.L
A.sixteen5U:{8K/a'i9^(}:j.L
B.sixteenth5U:{8K/a'i9^(}:j.L
C.the sixteenth5U:{8K/a'i9^(}:j.L
D.the sixteen5U:{8K/a'i9^(}:j.L