1.our,let's,classroom,clean,now(!)2.not,floor,let's,the sweep(.)3.lose,heart,don't,your(!)4.hang,not,bag,let's,the,here,big(!)5.the,dust,please,desks(!)(连词成句)I often ______to the park with my schoolmates________(乘地铁去)(根据提示完成句子)我该怎么做(用英语回答)1.乘公交车时发现小偷:2.郊游时,同学掉进深坑里:3.和艾滋病病毒携带者吃饭时:4.下楼梯时,有同学摔倒:5.爸爸妈妈下岗了: