学习语法首先要学习句子，因为句子是人类语言的核心，通过对句子的分析理解，可以更好的掌握语法。下面是小编整理的英语四级语法模拟练习(18)，希望对你的语法学习有所帮助！

　　171.English has become a communication _______ for people from different countries.

　　A. merit B. stream C. enjoyment D medium

　　172.During the eight years war, many people _______ their blood for their country.

　　A. shed B. tempted C. reserved D. devoted

　　173.You have greatly _______us. What you have done is not what you told us about several weeks ago.

　　A. disappointed B. deserted C. clarified D. opposed

　　174.Before you begin writing your paper, please write ------__________ first. Then we can have a better idea about what you are going to talk about.

　　A. an origin B. a detail C. an example D. an outline

　　175.If you ask why I plan to study in the United States, the only answer is that it is a _______ for me .

　　A. chapter B. ceremony C. chamber D challenge

　　176.A _______ political and economic situation is very important for the development of any country.

　　A. stain B. stable C. peaceful D. pink

　　177.The financial support is decided not only according to your GRE score, but also according to your _______ in college.

　　A.performance B.policy C.smart D.statement

　　178.The World Trade Center is often called a _______ Building, because it is made up of two identical buildings.

　　A. Alike B.Folk C.Twin D.Former

　　179.It is impossible for us to _______ such a difficult task within the limited time.

　　A.fuel B.frown C.fulfill D.frost

　　180.Please do not _______ when somebody else is talking.

　　A. intend B.interpret C. interrupt D.invest

　　171.D

　　172.A

　　173.A

　　174.D

　　175.D

　　176.B

　　177.A

　　178.C

　　179.C

　　180.C