I am Sunday in English class 是什么时态

I am going h___ in the mountains next Sunday. I am Sunday in English class 是什么时态 This Sunday I am going to the b____ garden for trip in our city. this sunday i am going to the b-------garden for trip in our city. hey i dont know chines engli Are you free Yes,I am,A .on this SundayB.in this Sunday.inC.this SundayD.at this Sunday我不知道哪个是对的... I am going to visit my grandparents on the morning of sunday.时间介词为什么不用in 而用on. I in the city last sunday.A.get lost B.am lost C.lost D.was lost I am alone in I am in i am in a I am all in i am in school i am in trap I am all in. In fact,I am i am in I am in