1、The sun is behind the hill/mountain.2、There is a chair near/next to the desk/table.3、We are sitting on the chairs/bench.4、There is a light over/up my head.你好！第三句的椅子是不是chair不好意思打错了，应该是第二句椅子是chair是吖，椅子就是chair，我打错了？没有，不好意思，是我看错了谢谢你的帮助