【小题1】Sailing races ______________ ( hold ) on the lake at 11:30 next Tuesday.
【小题2】Our English teacher requested that the homework ______________  ( hand in ) the next morning.
【小题3】Some great people said it was their primary school teachers and lessons ________they were fond of that influenced their life.
【小题4】The social problem ________ the two sides are debating with each other is a serious one.
【小题5】This song _________ already ___________ ( teach ) in our music class.