My brother studies in _ university and he knows a lot about

My brother studies in _ university and he knows a lot about My brother is a s____fan.he knows a lot about football and b my little brother is young ,and he knows a lot.这句话哪错了? My little brother is young,and he knows a lot.哪里错了 He knows a lot about hispen ______ My younger brother is very younger,but he knows a lot ------,he knows a lot about space and satel-lite.A.As he is 连词组句 in,lot,and,stamps,about,a,Tom,it,is,collecting,knows,in he knows a lot about the world by reading m___ and newspaper 英语选择,He knows lot _________ Beijing.A.of B.at C.in D.about young he is ,he knows a lot about the world ___as he is,he knows a lot about the adult.