Once Mary starts,we all will be happy.Once 是什么词

Once Mary starts,we all will be happy.Once 是什么词 once it starts,it‘ll snow a lot once it starts,nobody can stop revolving cogwheel.中文是什么 Can we once again . Mary and I see each other ________, but not as often as we used to. A. sooner or later B. once inB. once in a while C. in the end D. more or less We have to go back becaus it starts to rain. We don't go bake though it starts to rain While Tom and mary we We all call (she) Mary once we dreamt that we were strangers. ___do you go to the cinema,Mary?Once a month. Once he starts a job he won't stop until it's finished 语法讲解时态讲解 为什么用starts 不用start Mary cleans her room once a week?划线提问（划线部分：once a week） Mary is very young ,but she knows a lot____Mary is very young,she knows a lot2.Why don't we go hiking this weekend?__ ___go hiking this weekend?3.Li Ming watches TV once or twice a week.对once or twice 提问____ ____ ____ ____ Li Ming watch TV a we 1,we should do more exercise to keep healthy为什么要用to为什么要用more而不用mary?,2,i don't have time to eat breakfast 为什么要用to不用for?3,after that he starts to do his family为什么要用to?4,the text is about Tom's weekend No matter where we are going,it starts from where we are.啥意思? Once he starts a job,he won’t stop ____________it is finished.选项:a、tillb、afterc、sinced、until单选 she is such a computer fan that you cant tear her away from the computer (once)she starts为什么since不行?这里once