文章献给准备过英语专业四级的同学，给同学一些练习，希望大家考试成功。
1.First published in 1927, the charts remain an _______ source for researchers.
A intelligent
B indispensable
C inevitable
D identical
2. Please___ dictionaries when you are not sure of____ word spelling or meaning.
A search
B seek
C inquire
D consult
3. It ____ you to at least 50% off the regular price of either frames or lenses when you buy both.
A credits
B entitles
C presents
D tips
4. The __ at the military academy is so rigid that students can hardly bear it.
A confinement
B convention
C discipline
D principle
5. Doctors warned agaisnt chewing tobacco as a _____ for smoking.
A succession
B substitute
C revival
D relief
答案1-5BDBCB
1.选B indispensable to do sth, indispensable for sth/ doing sth 不可缺少的,必需的
inevitable 不可避免的，必然发生的
identical同一的,identical to/with sb/sth与……完全相同的
2.选D consult with sb 与某人商量,consult查阅
3. 选B entitle sb to sth(用于被动语态) 给某人获得某事物或权利
4. 选C discipline 训练方式,处罚
confinement限制，监禁
convention大会
5.选B substitute 代替, 替用品
revival恢复，苏醒
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