A、ok
B、，修饰的句子必须用现在完成时，不能用进行时become
C、C.，banks make them harder...时态错误，同B
D、因为banks raised old fees and invented new ones，避免新费用变得越来越难，them指代new ones；逻辑错
E、同D
zoologist Graham Twigg employs urban case studies suggesting that the rat population in Europe was both too sparse and insufficiently migratory to have spread plague. 真是奇怪，模拟的时候就看不到这句话，整理错题的时候就能看到了
A、is则根据就近修饰原则，定语从句that they may not think is true必然修饰一个最近的单数名词。按照嵌入式关系分句的概念，该句可以还原为：they may not think (that) an opponent is true在逻辑上，它们可能不认为对的，应该是“言论”，而不是“对手”，而is谓语动词单数，就近修饰单数名词opponent“对手”作主语，“对手错”语意错
B、are 谓语动词复数，就近修饰复数名词先行词statements作主语，“言论错”OK
C、从句可以跳跃修饰名词statements，代入先行词则有：they may not think statements to be true. 复合宾语，考查不定式和从句的区别。由于think是看法类动词且属于主动语态，所以约束力较弱，应该用宾语从句，而不能用不定式短语
D、of as，of和as均为介词，放在一起导致了语法错误
E、they may not think (that) it is true.该定语从句中什么成分也不缺少，导致了先行词无法在定语从句中充当任何成分
A、主语是percentage，Holland是状语描述spent动作“花费动作在Holland”语意错
B、they无合理指代对象
C、their无合理指代对象
D、Holland主语，spend谓语动词“花费”percentage of its gross national..；than...spending 前后成分无法平行并列
E、than前后句子并列OK
C:'gathering information' is what the navigators did as they sailed around the earth. so, for the sentence to make sense, the modifier has to describe that whole action.
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A、ok
B、，修饰的句子必须用现在完成时，不能用进行时become
C、C.，banks make them harder...时态错误，同B
D、因为banks raised old fees and invented new ones，避免新费用变得越来越难，them指代new ones；逻辑错
E、同D