请教一句句子的类型They arrived at a house,in front of which sat a sma

请教一句句子的类型They arrived at a house,in front of which sat a sma They arrived at a house,in front of which sat a small boy. 帮我分析一下这句话：they arrived at a house, in front of which sat a b They arrived at a farmhouse,in front of which sat a small bo They arrived at a farmhouse ,in front of ——sat a small boy They arrived at a farmhouse and in front of _____ sat a smal Soon they came to a farm house,and in front of which sat a s They arrived at a farmhouse,in front of which a small boy sa They arrived at the farmhouse, in front of which _________. We arrived at a house .There was a big tree in front of it.用 They arrived at a farmhouse,in front of ___sat a small boy.A They arrived at a farmhouse,in front of ______sat a small bo