1过去式：was
过去式题目：
1. The building _was_ (is) constructed from the design of that architect. 这幢大楼是按那位建筑师的设计建造的。
2. That _was_(is) my fault. 那是我的过错。
3. He _was_ (is) the product of his period. 他是他那个时代的产物。
4. The statue _was_ (is) cast in bronze. 这座塑像是用青铜铸成的。
5. It _was_ (is) an embarrassing situation, but they carried it off well. 这是一个尴尬的局面，但是他们成功地应付过去了。
2过去分词：been
过去分词题目：
1. The meat had _been_(is) left out for days and had started to smell. 这肉放在外边已有好几天了， 都开始有臭味了。
2. All the problems have _been_ (is) solved. 所有的问题都解决了。
3. All the materials have _been_ (is) prepared. 所有的材料都备齐了。
4. My safe has _been_ (is) honeycombed by him, but he didn't open it. 他把我的保险箱搞得千疮百孔了，但他依然没能把它打开。
5. These materials have _been_ (is) digested into a handy pamphlet. 这些材料已被汇编成便于使用的小册子。
