1 It is as difficult to prevent crimes against property as those that are against a person.
A those that are against a
B those against a
C it is to prevent those against a
D preventing those against a
E it is against a
答案为C。如果有选择为“to prevent those against a”，是不是更好？
2 Never before had taxpayers confronted so many changes at once as they had in the Tax Reform Act of 1986.
A so many changes at once as they had in
B as many changes at onve as they confronted in
答案为B。但A为什么不对？never在句首表否定，可以用so.作者: joywzy 时间: 2003-3-1 08:01 标题: to shala
1,C好，平行并列，做题应从五个选项中选最优的，但有可能答案本身并不perfect.
2，in the Tax Reform Act of 1986=》 时态一般用过去时，而不用过去完成时。
在比较两个人（事，程度等）在某方面相同时，用as...as ;不相同用not so/as...as，所以C，D在这方面的表达均可。作者: Louisa_xy 时间: 2003-3-1 22:39
第二个as后面的it is 是必需的
第一个it指的是to prevent crimes against property，第二个it 指的是to prevent those against a person
to prevent crimes against property is as difficult as to prevent those against a person.
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