it appeared that he didn't know what was happening=he()()to know _英语解答

it appeared that he didn't know what was happening=he()()to know what was happening

人气：275 ℃　时间：2019-08-20 19:52:50

解答

应该填写
didn't appear
或
appeared not
两个都可以
似乎他不知道发什么了什么.
其否定形式为appeared not to do 或 didn't appear to