Question

【题目】Many airlines now allow passengers to print their boarding passes online ______ their valuable time.

A. save B. saving C. to save D. saved

Answer 1

【答案】C

【解析】句意：为了节省乘客的时间，许多航空公司现在允许他们网上打印登机牌。此处是动词不定式表目的，故选C。