今天我们将继续学习含有be动词的一般过去时的特殊疑问句，今天我们将使用的特殊疑问词有how long（多久）、who（谁）以及what（什么）。请试着回答以下几个问题：How long was your last trip?（你上一次旅行玩了多久）Who was your best friend in primary school?（谁是你小学时最好的朋友）How long was your first class in university?（你大学里第一节课上了多久）Who was your favorite singer when you were a child?（谁是你小时候最喜欢的歌手）What was your nickname when you were a child?（你小时候的外号叫什么）Did you have a nickname?（你以前有外号吗）Do you have a nickname now?（你现在有外号吗）What was your favorite color when you were a child?（你小时候最喜欢的颜色是什么）What was your favorite food when you were a child?（你小时候最喜欢的食物是什么）What was your favorite fruit when you were a child?（你小时候最喜欢的水果是什么）Did you eat fruits?（你吃水果了吗）