across,over,between,off,along,in,on.into,out of,under有什么区别...答:The boy took hold of the ladder and began to climb.那孩子抓住梯子开始往上爬。I’ll explain, and you will soon get hold of the idea.我要解释一下,你很快就会懂得这个意思的。do a favor to/do sb. a favor给别人帮忙,给别人恩惠Will you do me a favor to lend that book to me?你能不能...