2. 外语
  3. ______was one regarded as impossible has now become a reality.

______was one regarded as impossible has now become a reality.

admin2018-01-16  97
问题 ______was one regarded as impossible has now become a reality.
选项 A、What
B、That
C、Which
D、As
答案A
解析 本题考查连词的用法。因为本句为主语从句，what在从句中做主语，因此A为正确答案。
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