8. The proposed health care bill would increase government regulation of health insurance, establish standards that would guarantee wider access to people with past health problems and to workers changing jobs who otherwise could be uncovered for months.
(A) establish standards that would guarantee wider access to people with past health problems and to workers changing jobs who
(B) establishing standards that would guarantee wider access to people with past health problems and to workers who are changing jobs and
(C) to establish standards that would guarantee wider access to people with past health problems and to workers who change jobs that
(D) for establishing standards that would guarantee wider access for people with past health problems and workers changing jobs who（B）
(E) for the establishment of standards that would guarantee wider access for people with past health problems and workers who are changing jobs that
答案是B
这题我用排除法选B但我不知道B中如何平行 otherwise could be uncovered for months.跟谁平行
establishing standards.....是－ing分词短语对主句作进一步的解释。otherwise could be uncovered for months 跟 are changing jobs 平行。是定语从句中的平行结构，这个定语从句who are changing job and otherwise could be uncovered for months 是来修饰前边的workers.
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