Question

__________ it is true that a student’s most important goal is to do well in his or her studies,..

__________ it is true that a student’s most important goal is to do well in his or her studies, it doesn’t need to be the only goal. A．While B．As C．When D．Before

Answer 1

A

试题分析：考查连词，A. as当…时候B. until直到…C. while当…时候D. when当…时候，before主要引导时间状语从句，意为“先于”“…之后才”“(不多久)就…”。当主句是将来时时，从句谓语动词须用现在时；当主句是一般过去时或过去完成时时，从句常用过去时。before引导的时间状语从句不能用于否定式，when所引导的从句，其谓语动词即可是持续动词，也可是短暂动词；谓语动词动作发生的时间可以与主句谓语动词的动作是同时、或之前、之后；while句中的谓语动词是持续动词，不用短暂动词，位于动作发生的时间通常与主句谓语动词动作发生时间是同时；as侧重指从句的动作与主句的动作同时进行，谓语动词可以是持续性动词，也可以是短暂性动词，所以选A 点评：连词是高考常考内容，本题不同的词意思相同，但是它们有区别，要求考生掌握它们的区别 即学即练：He was about to make a call to Tom _____ Tom patted me on the shoulder. A. as       B. until        C. while         D. when 选D