It is not easy ( )to drive a bus well 括号里选什么?learn\to learn\

It is not easy ( )to drive a bus well 括号里选什么?learn\to learn\ But it is not easy to learn English well. Learning English well is not easy和It is not easy to learn en （ ） is not easy to learn English well. to learn English well is not too easy同义转换 To learn English well is not easy.(保持意思不变) it is well worth making ______ to learn how to drive a car He found+什么not easy to learn English well it's not easy for people to learn english well.为什么要用to learn I think it is not easy to learn English well.这个句子为什么不用否定前移啊? "It is not easy to learn English well but if you ________,yo It’s not easy to learn a foreign language well.Jack knows 怎样