JackisateacherofEnglish.Heisnotyoung，butheisnotold.Hehasaroundfaceandblackhair.Heistall.Therearefiftystudentsinhisclass.Theyalllikehim.Nowit'sintheafternoon.Look，somestudentsareworkingintheclassroom.Jackisthere，too.HeishelpingthemtostudyEnglish.Heisagoodteacher，andheisagoodfriendofthemall. ()1.WhatdoesJackdo? A.Heisaworker. B.Heisateacher. C.Heisadoctor. D.He'sanurse. ()2.Whatcolourishishair? A.It'sblack. B.Hisheiriswhite. C.Itisbrown. D.Hehasyellowhair. ()3.Howmanystudentsarethereinhisclass? A.Therearefifteenstudentsinhisclass. B.There'sfifty. C.Hehasfifty. D.There'refiftyinit. ()4.Jackisagoodteacher，isn'the? A.Yes，heisn't. B.No，heis. C.Yes，he's. D.Yes，heis. ()5.Whatarethestudentsdoingintheclassroom? A.Theyarewalkingthere. B.Theyaredoingtheirlessons. C.Theyarehelpingtheirteacher.