给下列问句选择正确的答语。
① How many books do you have?____ A. I bought a lot of books.
② What are the rabbits doing?____ B. They are onions.
③ Can you play the piano? ____ C. I have twenty books.
④ What did you do last Sunday? ____ D. They are jumping.
⑤ What are these?____ E. Yes, I can.
