You must work hard( )English.A.on B.at C.A or B

You must work hard( )English.A.on B.at C.A or B work hard () English A.in B.at C.on you work hard next time,mustn't you A.must B.can C.should English is _______ .please work hard at it.A .help B.helps C You'll do better in English___you work hard.A.than B.or C.if If you work hard.you'll get the reward_time.A.in B.at C.into Plentig tree is_____.I must help you.A hard work B a hard wo it's (),so we must().A a hard work,work hard B work hard,har The workers____very hard.A.all work B.are all at work C.work Are you here on business or ___ fun A,in B,on C,at D,for You must line up _______ the desk.A.on B.at C.in D.under Learning English well is work.A.an easy B .a easy C.hard D.a