3000-4000。浙江省专升本英语学科考试的整体难度，在三级到四级之间，单词量也要求在3000-4000个左右。因此考生每天积累的生词，至少要在50个左右，而且要经常复习巩固，多多重复。
背了单词还不够，有些单词意思太像了，让人傻傻分不清楚，这里给大家献上一组必须熟记的易混词辨析:
ensure, assure, insure, guarantee
ensure: make sth.certain to happen 确保(某件事情/某件事情的发生)
You must ensure that my training courses are properly arranged. (ensure that....
你必须确保我的培训课程安排妥当
You must ensure the proper arrangement of my training courses.(ensure sth.)
你必须确保我的培训课程安排妥当
assure: to tell someone that something will definitely happen or is definitely true so thatthey are less worried 使确信，让对方放心
can assure you that he is an honest man.(assure sb. that...)
我可以使你放心，他是个诚实的人。
can assure you of his honesty.(assure sb. of sth.)
他的诚信，我向你保证
insure: to buy insurance so that you will receive money if something bad happens to youyour family, your possessions etc给...保险;投保
You' d better insure your property against storm damage. (insure...against...
你最好为防止遭风暴袭击而为你的财产上保险
guarantee: to promise to do something or to promise that something will happen 保证担保
guarantee you your future success. (guarantee sb. sth.)
我可以向你承诺你未来的成功。
to make a formal written promise to repair or replace a product if it breaks within a
specific period of time 为[产品] 提供保修;包换
The TV set has a year's guarantee.
这台电视机有一年的保修期
