选择合适的句子,补全对话。Mary: Excuse me.
Tom: {#blank#}1{#/blank#}
Mary: I want to buy a bag online. {#blank#}2{#/blank#}
Tom: {#blank#}3{#/blank#}
Mary: How much is it?
Tom: {#blank#}4{#/blank#}
Mary: {#blank#}5{#/blank#}
Tom: Okay!
A. It's 100 yuan.
B. I'll take it.
C. Can you help me?
D. Sure. Look! Here it is.
E. Yes? What can I do for you?