I found_helpful to go to English Corner every week to practise English.

问题描述:

I found_helpful to go to English Corner every week to practise English.
Ait. Bthat. Cits. Dthis.求解 要理由

应该选A,我发现每周去英语角练习英语是十分有用的,it代替 go to English Corner every week to practise English.,如果是that is ,也是正确的