题目

The plane ____ at 7:00 p. m. , so I have to be at the airport by 6:40 at the latest. A.has left  B. would leave       C. will have left         D. leaves 答案：D某工厂要加工660套衣服，已经加工了5天，每天加工75套，余下的要3天完成，每天应加工多少套？