【導(dǎo)讀】Lesson28:. IntheBedroom. twenty. twenty-one. twenty-two. twenty-three. twenty-four. twenty-five. twenty-six. twenty-seven. twenty-eight. twenty-nine. thirty. Nieen+=. Eighteen+three=. Ten+=. +eight=. -ten=. twenty. twenty-one. thirty. twenty-four. twenty. one. twenty. Sixteen. Thirty. Let’scount!