A-A+ ______ is well known ______ Hong Kong returned 2022-08-12 10:09:03 问答库 阅读 195 次 问题详情 ______ is well known ______ Hong Kong returned to China on July 1st, 1997. A) It, that B) As, /C) As, as D) It, which 参考答案 Ait为形式主语，其后的that从句为主语从句。比较下面一题，答案选B。
