介绍一项小发明的短文写作 — 英语填空题
题目
请根据提示完成短文，介绍一项小发明。每个方框只用一次。词库：[A. a clip-on book light] [B. I often read in bed] [C. it turns on when I open it] [D. it helps me read without waking my family]。My invention is ___. ___, but the room is sometimes too dark. This small light is easy to use: ___. ___.