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5.     Carbon-14 dating reveals that the megalithic monuments in Brittany are nearly 2,000 years as old as any of their supposed Mediterranean predecessors.

(A) as old as any of their supposed

(B) older than any of their supposed 不改变原文意思吗？

(C) as old as their supposed

(D) older than any of their supposedly（B）

(E) as old as their supposedly

17.   Native American burial sites dating back 5,000 years indicate that the residents of Maine at that time were part of a widespread culture of Algonquian-speaking people.

(A) were part of a widespread culture of Algonquian-speaking people

(B) had been part of a widespread culture of people who were Algonquian-speaking

(C) were people who were part of a widespread culture that was Algonquian-speaking

(D) had been people who were part of a widespread culture that was Algonquian-speaking（A）

(E) were a people which had been part of a widespread, Algonquian-speaking
                    culture

Residents 可以是 part of culture?

19.   In addition to having more protein than wheat does, the protein in rice is higher quality than that in wheat, with more of the amino acids essential to the human diet.

(A) the protein in rice is higher quality than that in

(B) rice has protein of higher quality than that in

(C) the protein in rice is higher in quality than it is in

(D) rice protein is higher in quality than it is in（B）

(E) rice has a protein higher in quality than has   Correct?

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