题目

Hello, everyone! I’m Jason. This is my bedroom. You can see ________ pictures on the wall. The lamp（台灯）is on the desk. But the football is ________ the desk. Where is the bed? It’s near the window. My father and ________ bedroom is near my bedroom. Some flowers and a big nice bed ________ in their room. The window is white. And the door is white, ________.【1】A. a B. an C. some【2】A. under B. on C. in【3】A. mother B. uncles C. mother’s【4】A. am B. are C. is【5】A. too B. and C. but4．如图，在△ABC中∠B=90°，AB=7cm，BC=12cm，点P从点A开始沿AB边向点B以1cm的速度移动，点Q从B点开始沿BC边向点C以2cm/s的速度移动，一点到达，另一点立即停止运动．如果P，Q分别从A，B同时出发，经几秒钟，使△PBQ的面积等于10cm2？