— Have you seen my iPhone 5? I left it here this morning.— Is it black one? I think I saw it somewhere.
—How old are you?—I’m nine ____________ old.A.year B.years C.year’s
—When is Tree Planting Day?—It’s ____________ March.A.in B.on C.at
What events do you have ____________ your school?A.for B.on C.at
—____________ is that dress?—Thirty dollars.A.When B.How much C.What
—When were you born?—____________.A.On March nineth B.In May 5 C.On February fifteenth