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题库 / Prep2008E1-SC-240
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 born
than they were
than there had been
than had been born
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than作为比较结构，主从句的主语谓语都是 babies born to women所以全部省略
懂了
were born, were你给写丢了，不能丢
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