考博易错题（2018/6/27）

第1题： Which group of people make some efforts to help pupils in elementary schools A．Teachers B．Researchers C．Grandparents D．Senior citizens

【单选题】： A     B     C     D

第2题：A．draft B．voice C．air D．sound

【单选题】： A     B     C     D

第3题： For ten years the problem about the water has not been solved, we came to think that it has been a ______ problem in this area. A．perpetual B．persuasive C．picturesque D．possessive

【单选题】： A     B     C     D

第4题：They seizedBelgrade, though only after having encountered a stubborn ______. A．persistence B．resistance C．insistence D．assistance

【单选题】： A     B     C     D

第5题：

【单选题】： A     B     C     D