It is time for us ___ ____ to schol .我们应该去上学了.怎么填

It is hard for us __(exercise)every day It is hard for us __(exercise)every day.why? Doctors say it is good for us.(同义句转换）Doctors say it __ __ for us. please __ the Tv,IT IS time for cctv news It is time for us to play games. It is time for us to say goodbye It is time for us ____ (play) baseball. It is time for c .Let us read the books Doctors say it good for us.=Doctors say it __ __for us.(同意句转换)DOCTORS SAY IT IS GOOD FOR US.DOCTORS SAY IT __ __ FOR US. 我们该登机了 It's time for us to __ __ the plane 他冷得脸色发青 He was so cold that his face __ __ It is important for us to learn science when we're young We find __ __ __ __ __ __when we're young To eat healthy food is important for us.__ __ important for us __ __ __ __.改为同义句、 it time for ____?117.Is it time for ____?A.us to play chessB.us for playing chessC.we for playing chess选那个 It is time for lessons.Let us hurry up!(同义句转换） It is time____us____ ____lessons.Let us hurry it is high time for us relected everything 还是 for us to relect..这个it is high time..虚拟语气要用吗 那个不定式的对不低啊? it is good for us It's time for us ____lunch now It is time __(she) to have breakfast.to'her,还是for'her?why?