问题补充:
单选题Theoldmanwasseen_______intheparkat7:00a.m.yesterday.A.exerciseB.exercisedC.to exerciseD.exercising
答案:
D解析在主动语态中,see sb doing/see sb do ,本题是被动语态,表示在昨天的7点,正在进行的动作,故选D
时间:2021-06-30 07:41:38
单选题Theoldmanwasseen_______intheparkat7:00a.m.yesterday.A.exerciseB.exercisedC.to exerciseD.exercising
D解析在主动语态中,see sb doing/see sb do ,本题是被动语态,表示在昨天的7点,正在进行的动作,故选D