补写出下列句子中的空缺部分。
促使明朝中后期资本主义萌芽出现的直接原因是( )
①I want some bread. ____ A.
②The soup is cold. ____ B.
③The bed is soft. ____ C.
④The chair is hard. ____ D.
⑤I like the milk. ____ E.