Question

1. It is one thing to have a knowledge of first aid,but quite another           in reality. (apply)

了解一点急救知识是一回事，但将其运用到现实生活中去救人则完全是另一回事。

Answer 1

1. to apply it to savi ng people考查不定式结构和apply 的用法。apply sth. to doing sth.运用某事到做某事中，to是介词，后接动名词或名词。"quite another to apply it to saving people"是与前一分句相对称的"it is quite another to apply it to saving people"分句的省略形式