64. Whereas the use of synthetic fertilizers has greatly expanded agricultural productivity in many parts of the world, an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers may accelerate soil structure deterioration and soil erosion。
A. an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers
B. an increase in their use can create serious environmental problems like water pollution, and if substituted for more traditional fertilizers, it
C. if these fertilizers are used increasingly, they can create serious environmental problems such as water pollution, and if used as substitutions for more traditional fertilizers, they
D. the increased usage of these fertilizers can create serious environmental problems such as water pollution, while if substituted for more traditional fertilizers, this substitution
E. the increased usage of these fertilizers can create serious environmental problems like water pollution, while their substitution for more traditional fertilizers
ans:A
mine:C(C的if从句怎么就不好呢)
93. Those skeptical of the extent of global warming argue that short-term temperature data are an inadequate means of predicting long-term trends and point out that the scientific community remains divided on whether significant warming will occur and what impact will it have if it does.
A. on whether significant warming will occur and what impact will it have if it does.
B. on whether warming that occurs will be significant and the impact it would have
C. as to whether significant warming will occur or the impact it would have if it did
D. over whether there will be significant warming or the impact it will have
E. over whether significant warming will occur and what impact it would have
这个题改选什么？我选的是A，但是觉得结构不太明白。BCDE的will和would放在一起不对吧？
95. While Hands Holbein the Younger is most often identified with his English portraits, scholars have long been recognizing him as a superb draftsman and a remarkably versatile artist and who was fundamental in synthesizing the novelties of the Italian Renaissance with the tradition of
A. been recognizing him as a superb draftsman and a remarkably versatile artist and who
B. been recognizing him for being a superb draftsman and a remarkably versatile artist and he
C. recognizing him as a superb draftsman and a remarkably versatile artist who
D. recognizing him as a superb draftsman and a remarkably versatile artist and he
E. recognizing him for being a superb draftsman and a remarkably versatile artist and who
ans：C
mine:C 其他几个都有错，但是有have doing这个结构吗？
157. In the mod-1920s the Hawthorne Works of the Western Electric Company was the scene of an intensive series of experiments that would investigate changes in working conditions as to their effects on workers’ performance.
A. that would investigate changes in working conditions as to their effects on workers’ performance
B. investigating the effects that changes in working conditions would have one workers’ performance
C. for investigating what the effects on workers’ performance are that changes in working conditions would cause
D. that investigated changes in working conditions’ effects on workers’ performance
E. to investigate what the effects changes in working conditions would have on workers’ performance
ans：B（怎么觉得结构特别别扭）
lz可以下载个"破解prep语法分析注释"里面有很详细的解释的,cd就有的下了
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