题目

---Could you tell me_______？ ---At nine o'clock，in ten minutes． A．how will he leave  B．when he has left C．why he is leaving  D．when he will leave 答案：D70与35的和除以40与25的差，商是多少？正确列式是（　　）A．70+35÷40-25B．（70+35）÷（40-25）C．（40-25）÷（70+35）