look at the picture there is a boy () mountians

题目

look at the picture there is a boy () mountians
A climb Bclimbing Cclimbed Dclimbs

答案

look at the picture there is a boy ( climbing ) mountians
a boy 和climb 在逻辑上是主谓关系,用现在分词作定语.
“看这张有一个男孩正在爬山的图片”