-____doesn't always happen as we expect.-Really!So we mustn'

-____doesn't always happen as we expect.-Really!So we mustn' —___ doesn t always happen as we expect. 1.We mustn't cut down so many trees!What a pity we can't see We mustn‘t throw( )away we can't expect a woman to do excellent work as well as look there weren't as many people at the meeting as we had expect The meeting is very important .so we __ be late. 为什么用mustn't We just didn't expect the bombshell as to who it was. we didn't expect to meet her there,so imagine our s_____ on we mustn't do that again We mustn't cook without ___ adult. We mustn't smoke here.改被动