Question

() of the classroom is full.A either B ALL C everyone D ever

Answer 1

你好.答案是B

all of the classroom == the whole classroom -------整个教室.------这里强调单个房间

语法：

all of the 名词单数 -------all of the room , all of the work -------在这里,你就把the当作my使用,这样你就没有疑问了： all of my classroom.

all of the 名词复数 ------- all of the rooms are full --------这里强调多个房间