给下列问句选择恰当的答语。

⑴What colour is it?                 A. His name is Mike.

⑵What's in the classroom?     B. A blackboard, many desks and chairs.

⑶What's his name?                 C. Yes, it is.

⑷Where are the keys?             D. Five.

⑸Is this your mother?              E. It's blue.

⑹How many apples are there?  F. They're in the door.