教室的学生

教室的学生（the student in the classroom/students in the classroom)
骑棕色自行车的那位(the one ridding a brown bicycle )
河里有什么?(What in the river there are?)
有四条船.(There are four boats.)
书下有自行车吗?(Is there a bicycle under the book?)
没有。（No.)

（最后那句很奇怪阿，什么叫书下有自行车吗？）