【问题】 He was lying othe grass, his hands _____ under his head.( )·to cross· crossed· crossing·to be crossing

He was lying othe grass, his hands _____ under his head.( )·to cross· crossed· crossing·to be crossing

正确答案:单选题· crossing

题目解析:本题出自西北大学,个案工作,由丰阳塔题库搜集整理。