读一读，选择正确的答案，将字母代号写入前面的括号内。① Excuse me, can I use your pencil? {#blank#}1{#/blank#} A. It's on your desk.
② Where is my map? {#blank#}2{#/blank#} B. Sure.
③ Maybe it's in your desk. {#blank#}3{#/blank#} C. No. They aren't.
④ Are they in your toy box? {#blank#}4{#/blank#} D. Yes, it is.
