1,He had become one of the greatest artistits of his day. of his day 该如何翻译?是“在他那个年代”吗?
2,when 和 while 的区别。如:I have my supper when I heard a loud noise. 这里的when 能够换成while 吗?
3,in the hospital 和in hospital 的区别。
4,区别四个词组:before long, long before, not before long, not long before.
如果您能详细解答我小小的疑惑,不胜感激!