题目

—What class are you in? —I’m in .A. Class Four, Grade Seven B. class four, grade sevenC. Grade Seven, Class Four D. grade seven, class four 答案：【答案】A【解析】句意：你在几班？我在七年级四班。在几年级某班，某年级用Class +数字，Grade +数字，且班级，年级，数字，首字母大写。故选答案为A Edison asked his father why the hens could hatch eggs ___he couldn’t.    A. as      B. and        C. when      D. while