[文法] 錯改正

[okinawa0617 (小海龜)]

Glint was a favored material of prehistoric humans, which used it to make tools
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and weapons,because it would chip into shapes with sharp edges.
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答案是B，但我不知道要怎麼改？是要改成who嗎〈因為prehistoric humans〉

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推 mrsh2:YES
推 okinawa0617:謝謝您喔