[文法] 請教文法改錯

[okinawa0617 (小海龜)]

During the 1930s,large corportaions failure,causing the shareholders to lose
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thier holdings and savings.
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answer:B
不懂為什麼錯？


everything we think we have disposed of still here on our planet and in the
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ecosystem.
answer:c
看不出來為何錯？

拜託各為高手的解答
謝謝

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