on a first-class

on a first-class 求翻译!in the first-class carriage on a train many first-class photographs on show.意思 first-class What time do you usually have your first class?____eight o'clock____the morning.A.at;on B.at;in C.on;in D.on;on - Mary gained __into a first -class university due to her hard work on studies A expressionB reception C profession Dadmission We are in____ .a.one class b.Class First c.Class One d.Class one maths is the first class on（ ）morning. a class on a subject的意思 A first-or upper -second class undergraduate honors i want to book a first-class ticket.4055 This is______English class here.I hope you can enjoy my class.A.our the first B.the our first C.our first D.first the our选哪个? first-class reading是什么意思 first class object first-class honour是什么意思 什么是first class lever first class functions是什么意思 FIRST CLASS怎么样