There is a picture on_____side of the paper.A.all B.each C.both D.every

问题描述:

There is a picture on_____side of the paper.A.all B.each C.both D.every

答案选 each 因为一张纸有两面 所以不选 every (很多面)
side是单数 所以不用 all 和 both.