从II栏中选出与I栏句子相对应的答句。

I                          II

⑴What's this?           A. Yes, Mr Green.

⑵Open your book, Mike.    B. I'm sorry.

⑶What colour is the blackboard? C. Yes, please.

⑷Don't eat in class.       D. It's black.

⑸Would you like a cake?    E. Come in, please.

⑹May I come in?       F. It's a rubber.