52单词网 > 高中英语 > 高中英语题库 > We cannot figure out quite a number of insects, birds and animals are dying out．

We cannot figure out quite a number of insects, birds and animals are dying out．

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We cannot figure out quite a number of insects, birds and animals are dying out．

We cannot figure out ________ quite a number of insects, birds and animals are dying out．

[]A．

that

B．

as

C．

why

D．

when

试题答案

答案：C

标签：numberquiteinsectsofcannot

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