新概念英语第二册练习册第55课—57课
问题描述：
新概念英语第二册练习册第55课—57课
不是书后面那个习题
答
AacabccacabBuseam used to used toam using was used to C1.had,were having,sued to have\would have2.were digging,dug,often used to dig\would often dig3.was telling ,would always tell\always used to tell...