his backpack is on the floor.划线提问

his backpack is on the floor.划线提问 The backpack is on the (sofa)对划线部分提问 His flat is on （the seventh) floor?（划线提问）横线用括号代替 对划线部分提问：The plant is on the floor .划线处是on the floor The new library is on (the tenth) floor.划线提问 The bike is on the floor (对划线部分提问) His backpack is on the on the desk对on the desk画线提问 Her backpack is on the sofa.对划线部分提问（on the sofa) His book is on the desk.(划线提问His book His backpack is （under the desk）对括号进行提问 Are your watches on The pen is in the backpack对划线部分提问 The bike is on the floor 划线提问：_____ ___ the bike ____