根据上下文提示补全对话。A: What's on the farm?
B: {#blank#}1{#/blank#} {#blank#}2{#/blank#} a lake and some trees.
A: Is the farm {#blank#}3{#/blank#}?
B: Yes, it's very big.
A: {#blank#}4{#/blank#} {#blank#}5{#/blank#} an elephant on the farm?
B: Yes, there is. It's very strong.
A: Is there a house?
B: No, there {#blank#}6{#/blank#}.
