题目

—Have you decided when_____?—Yes, tomorrow morning.A．will you leave B．to be leavingC．are you leaving D．to leave 答案：【答案】D【解析】试题解析：decide+疑问词+to do（固定句型）如图，直线AB，CD相交于点O，OA平分∠COE，∠COE＝100°，则∠BOD的度数是_____度