（广东专用）2016届高考英语二轮复习定时训练：2_高考复习指南

（广东专用）2016届高考英语二轮复习定时训练：2

　　解析　unless引导条件状语从句。unless＝if not如果不。句意：你最终会成功除非你中途放弃。答案　unless______ his mother came back from work.

　　解析　until引导时间状语从句。not...until...直到……才……。句意：直到他妈妈下班回来才上床睡觉。答案　until________ I could ask him.

　　解析　before引导时间状语从句。before在…答案　before______ you have remembered it.

　　解析　until引导时间状语从句。until直到。句意：请一直读这首诗直到你记住它。答案　until how long it will be ______ a new drug is invented for AIDS?

　　解析　考查before引导的时间状语从句。此为It will be＋时间段＋before(……多久之后才……)结构的变形。how long 后的从句作imagine的宾语要用陈述句语序。答案　before______ you understand the rule，you will find it very easy to obey.

　　解析　once引导条件状语从句。once一旦。句意：一旦你明白了规则你就会发现很容易遵循。答案　Once______ in Beijing，I paid a visit to the Summer Palace.

　　解析　此题考查while引导的时间状语从句。当be动词。句意：在北京期间我参观了颐和园。答案　While完形填空体裁：说明文　话题：计算机科学　时间：15分钟mputer virus” is the __1__ between the biological virus and the evil program infected with computers.The __2__ of this term came from an American science fiction “The Adolescence of P－1”__3__ a living cell and turn it into a factory for __4__ viruses.However，computer viruses are small programs.They copy by attaching a copy of themselves to another program.