1. Heis_an_uglyman.2. Ihave_an_orange.3.Thereis_an_elephantinthezoo.4.Youare_a_goodstudent.5.Pleasetake_an_umbrella.6.Iam_a_student.7.Thisis_a_newbook.8.Ihave_a_usefulbook.9.Heteachesmathin_a_university.10.Ibought_an_MP3yesterday.11.Heis_an_honestboy.12.Igot_an_X-ray(x射线透视)。13.Myfatherboughtme_an_iphone5.14.Thereis_a_“u”intheword“hour”,thereis_a_“h”.15.Yaomingis_a_NBAbasketballplayer.16.Tomhad_an_unusualexperience.17.Thisis_an_egg.18.Ispent_an _hourdoingmyhomework