。如: Our class is divided into four groups. 我们班分成四组。 America is divided into over 30 stales. 美国分成 50 多个州。 (2)the first of which…是定语从句,修饰 semesters. 如: We live in a house, in front of which is a small river. 6 I live in Shijiazhuang, a ci...