介词+连词
一（2014安徽卷）25．The meaning of the word "nice' changed a few times it finally came to include the sense "pleasant." A. before B. after C. since D. while
考察状语从句连词词义辨析 【答案】A
连词before在…之前；after在…之后；since自从，既然；D当…时；然而；句义：在“nice”这个词最后包括有“pleasant”的意义之前，它的意思已经变化了好几次了。本句中的副词finally说明最后nice包括有“pleasnt”的意思，说明意义多次变化是之前发生的事情。根据句义说明A正确。
【举一反三】You can’t borrow books from the school library ______ you get your student card.
A. before B. if C. while D. as
〖答案〗A 本题考查状语从句的引导词。意思是：在你得到你的学生卡之前你不能从学校图书馆借书。所以选before。
二（2014安徽卷）31．What we expect from you is working hard hardly working.
A. less than B. rather than C. as well as D. as much as
考察介词短语辨析 【答案】B 介词动词less than少于…；rather than而不是…；as well as…和…同…也…并；as much as…多达…；句义：我们对你的期待是努力工作而不是几乎不工作。根据句义说明B正确。
三（2014北京卷）21. Some animals carry seeds from one place to another, ______ plants can spread to new places.
