给下列句子选择恰当的搭语，填对应的字母序号。Let's go and play. {#blank#}1{#/blank#} A. I'm nine years old.
How many ducks？ {#blank#}2{#/blank#} B. Thank you！
How old are you? {#blank#}3{#/blank#} C. Yeah!
How about this? {#blank#}4{#/blank#} D. OK. Let's go!
Have fun ! {#blank#}5{#/blank#} E. Six ducks.
