To learn English well is very useful 保持原意 怎么该?

To learn English well is very useful 保持原意 怎么该? To learn English well is very useful.同义句 We found it was very useful to learn English well I think——（this,that,it）is very useful to learn english well. 将I find it is useful to learn English well. we find it is very useful to study english well To learn English well is not easy.(保持意思不变) We found it very useful to learn English well.(变为同义句) The girl found （）very useful to learn English well.A：it B:th I found it very useful to learn English well.=___ ___ ¬u We found that it was very useful to learn English well.同义We to learn english is very useful nowsadays(同义句)_ _to learn en