问题标题：
【Ifyouhaveanyquestions,please____yourhands.Thestudentswerebusy____theirlessonsforthetest.preparingpreparingfortopreparetopreparefor】
问题描述：
Ifyouhaveanyquestions,please____yourhands.
Thestudentswerebusy____theirlessonsforthetest.preparing
preparingfor
toprepare
topreparefor
敖晨阳回答：
putup举起（你的手）
preparingfor(bebusydoingsth忙于做某事)
点击显示
英语推荐
热门英语推荐