they are going on a field trip.为什么用on?急

Are they going to have a picnic on( ) They are going on a field trip的翻译是什么? They are going to a l_____ on sundays They are going to the cinema __________tonight A.They are going to the cinema __________tonightA.on B.in C./ They are going on a trip,so they need a travel guide.的中文意思. THEY ARE GOING TO A they are going on a field trip.为什么用on?急 they are going on an extended holiday to australia,going Are they going ()a picnic ()asunny morning?AIn；in b on；in c on；on d in；on they are going to have a party____nine____the morning 1.at,on 2.at,in 3.on,at 4.in,on They are going to Hainan( )their vacation.A.on B.in C.for D.to They are going on a trip Hainan during the summer holiday They are going on a field trip next week.改为同义句 They are going to have a picnic on Sunday改为一般疑问句 They are going to ___there___a few days A.stay,for B.stay,on C.stayed,to they,a,going,theU.S,are,on,trip,to(.)怎么连词成句 They are going on a social studies field trip.变疑问句 They are going on a study trip to London at next week.英语改错题