同学你好，该知识点来自沪江网校《零基础直达BEC商务英语高级【职场精英随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
1. 问题出在as to soccer，as to的意思是“至于”而这里应该是和in swimming进行比较的，因此句子应该改成：
In swimming as in soccer, Evangelina proved time after time to be an abler competitor than Juanita.

2. by是多余的，因为这里两个动名词短语都应该是介词after的宾语，中间以and并列，句子改为：
Paul Ecke, flower grower and hybridizer, became known as Mr. Poinsettia after developing new varieties of the flower and pioneering it as a living symbol of Christmas.

祝同学学习进步~