Having been done ,done,having done ____many times,he still couldn't understand it.A、Having been told B、Told为什么答案是A，现在分词完成时的被动，B也可以表示完成和被动啊。同样，还有一道题：The building____last year is a restaurant.A、having been built B、built这道题为什么选B呢？
问题描述：
Having been done ,done,having done
____many times,he still couldn't understand it.
A、Having been told B、Told
为什么答案是A，现在分词完成时的被动，B也可以表示完成和被动啊。
同样，还有一道题：The building____last year is a restaurant.
A、having been built B、built
这道题为什么选B呢？
答