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