To be learned to smile 什么意思啊?

To be learned to smile 什么意思啊? All the new words require( )by heart.A,learn B,learned C,be learned D,to be learned 求详解. 英语翻译But there are lessons to be learned about war. i fand listening hard to be learned.的错误 i learned to give? Japanese is less difficult __ than English A to learn B learned C learning D to be learned 为什么We learned to be friendly to other people.用to be 不用toto be 怎么用 i find listening hard to be learned,为什么这里要改成i find listening hard to learn可不可以改成i find listening is hard to be learned, Mary found_____.AChinese difficult to learn BChinese difficult to be learned选什么,要解析 We have learned to expecttrains are going to be punctual.为什么错了 I learned to give up i fand learning hard to be learned.错在哪里 i fand learning hard to be learn The girl doesn't have to be made____.She is always addicted to study.A.learnB.to learnC.learningD.learned next to & close to I learned ____nothing there is far more to be learned from the astronaut翻译 英语翻译natural means something that comes from natural and does not have to be learned english is not easy to learn为什么不是to be learned英语不是被学,用被动语态吗? Phusics is difficult _____.A)for learning B)to be learned C)to learn D)of learning