2015-2016学年人教版高中英语必修4unit2+language+points+单元精品短语讲解课件(33张ppt)
2015-2016学年人教版高中英语必修4unit2+language+points+单元精品短语讲解课件(33张ppt)第4页

2. expand vt. Vi. (使)变大,(使)膨胀 The number of students is expanding rapidly. Metals expand when they are heated. The company_____ (已经扩大了20%)since it was set up in 1995. 答案:has expanded by 20%