---What on earth are the police busy with? ---They have been looking into how the plane crash ______...
2023-01-13 22:21:52 133次 2011-2012学年江苏省高三上学期阶段测试英语试题 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
---What on earth are the police busy with?
---They have been looking into
how the plane crash _______.
A. came out B.
came up C. came
down D. came about
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