I _____ my keys down the back of the sofa.

I _____ my keys down the back of the sofa. My keys are on the sofa 同上 Billy went back to his breakfast; I sat down on the sofa and my keys are on the sofa,对on the sofa画线部分提问 找出下列句中错误并改正 ； where is my books the keys are in the sofa I C I let go of the window seal and fell back down on to my hand 1.The big sign on the back of my door that says "keys" is to 初中英语习题用适当形式填空These keys _____(be not)on the sofa._____(thank My keys are on the sofa.对on the sofa 提问?是用where are my books My keys are （on the sofa).同上 My brother is (in bed).同上 The p a set of keys is on the sofa.(on the sofa部分提问）__a set of key I went back to the cinema to look for my keys,only_____