6、______A.Goodmorning.B.Howareyou?C.Happybirthday!()2.当你把你爸爸介绍给MissWhite时,你应说:______A.ThisisMissWhite.B.MissWhite,thisismydad.C.Heismydad.()3.当别人给你生日礼物时,你应说:_____A.Thankyou.B.Notatall.C.You'rewelcome!()4.当你见到一位新朋友时,应该说:________A.Howoldareyou?B.Goodbye.C.Nicetomeetyou!( )5.当别人向你说“Thankyou!”时,你应说:A. N