it?(discover) that the giant pandas are endangered.
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it?(discover)thatthegiantpandasareendangered.it?(discover)thatthegiantpandasareendangered.it?(discov
it?(discover) that the giant pandas are endangered.
it?(discover) that the giant pandas are endangered.
it?(discover) that the giant pandas are endangered.
正确答案为：
is discovered 被发现 （被动语态）
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