本课栏目开关,Period ThreeGrammar,this space flight.on an aeroplane，这是一个宾语从句。,that going into space.in the world，这是一个宾语从句。,That he is an honest boy，这是一个主语从句。,what he will do next，这是一个表语从句。,that hell fly back，这是一个同位语从句。,本课栏目开关,本课栏目开关,本课栏目开关,本课栏目开关,本课栏目开关,本课栏目开关,本课栏目开关,that,when,whether,what,that,本课栏目开关,本课栏目开关,本课栏目开关,It is known to us all that,Whether we go by bus or on foot,Which plan is better,When the meeting will be held,What we cant get,本课栏目开关,本课栏目开关,that,where,whether,本课栏目开关,本课栏目开关,本课栏目开关,本课栏目开关,本课栏目开关,where the post office is,who he is,whether/if hell come,that he is an honest person,I think it necessary,本课栏目开关,