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单项选择题

News item 6
Listen to the news report and choose the best answer to each question you hear.
A.
They used the skin from other parts of a the skin from burns.
B.
They put the skin cells from a fetus on the burned ones.
C.
They applied collagen to the burned skin to repair damage.
D.
They used the mixture of the skin cells from a fetus with collagen to repair damage from burns.

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