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.