13. According to scientists at the University of California, the pattern of changes that have occurred in human DNA over the millennia indicate the possibility that everyone alive today might be descended from a single female ancestor who lived in Africa sometime between 140,000 and 280,000 years ago.
(A) indicate the possibility that everyone alive today might be descended from a single female ancestor who
(B) indicate that everyone alive today might possibly be a descendant of a single female ancestor who had
(C) may indicate that everyone alive today has descended from a single female ancestor who had
(D) indicates that everyone alive today may be a descendant of a single female ancestor who（D）
(E) indicates that everyone alive today might be a descendant from a single female ancestor who
我选了E，答案是D，除了 a descendant of的固定搭配外， may和might的用法有何区别？多谢啦。
UP!
might
Past of may
used in auxiliary function to express permission, liberty, probability, possibility in the past *the president might do nothing without the board's consent*
or a present condition contrary to fact *if you were older you might understand*
or less probability or possibility than may *might get there before it rains*
or as a polite alternative to may *might I ask who is calling*
or to ought or should *you might at least apologize*
From w-m, very catchy.
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