We can’t figure out ______ quite a number of insects and birds are dying out． A． that B． as C． why D...
2022-10-25 15:45:52 197次 2014-2015学年北京市东城区普通校高三11月联考英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
We can’t figure out ______ quite a number of insects and birds are dying out．
A． that B． as C． why D．when
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