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题库 / GmatLaCourse-SC-31
According to public health officials, in 1998 Massachusetts became the first state in which more babies were born to women over the age of thirty than under it.
than
than they were
than had been born
略
略
题目分析：
本题可以比较的是两种年龄下发生的情况，所以(A)是正确的。(B)中的they were会让读者认为比较的是两个句子，即，more babies were born和they were，这在比较对象上不对等。(C)中under it修饰了born，逻辑意思荒谬：孩子们生下来时小于30岁。
more babies were born to women over the age of thirty than more babies were born to women under it.
"over the age of 30" and "under it" are exactly parallel elements,
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