一个英语改错题!two men tried to sell a painting that had been stole

一个英语改错题!
two men tried to sell a painting that had been stolen.the painting had been owned(was owned) by Mainmi Gillies,aged 84.she said it had been presented to one of her ancestors by the artist.she had owned it since 1926,when it had been given(was given) to her as a wedding present.who cannot name(cannot be named) for legal reasons,was found suspicious because he was looking for a buyer.he told a police detective,who disguised as a wealthy art lover,he was willing to sell the painting cheap because it was stolen.在括号里的是正确答案,我不知道被动语态的过去式和过去完成式究竟有什么区别.我觉得都可以,为什么一定要那样说呢?

(一).when it had been given(was given)
一般过去时和过去完成时用法有哪些不同?
1.在主从复合句中的用法不同
（1） 用在宾语从句中
在主句谓语为一般过去时的宾语从句中,既可用一般过去时,也可用过去完成时.但两种时态的意义明显不同.试比较下列两组句子：
She said she was a doctor.她说她是位医生.（说话时仍为医生）
She said she had been a doctor.她说她曾当过医生.（说话时已不是）
She said she had been a doctor for twenty years.她说她当过20年的医生.（主要强调说话时已当过20年医生,此状态可能已经结束,也可能还没有）
但是,如果从句中有表示具体时间的状语,则常用一般过去时.例如：
He said he was born in 1986.他说他是 1986年出生的.
（2） 用在含有after的主从复合句中
在含有after的主从复合句中,一般在从句中使用过去完成时,主句中使用一般过去时.例如：
After he had done his homework,he went out to play football.
因连词after本身能明确表示时间的先后关系,因而多数的主句和从句均使用一般过去时.例如：
After he arrived in England,Marx worked hard to improve his English.
（3） 用在含有before的主从复合句中
用在含有before的主从复合句中,一般在从句中使用一般过去时,主句中使用过去完成时.例如：
Lily had written some letters before she went out shopping.
有时,也可以在从句中用过去完成时,主句中用一般过去时,这样就可使描述更为生动.试比较：
We got to the station before the train had left.火车尚未开动之前,我们就到了车站.
We had got to the station before the train left.火车开出之前,我们就已经到了车站.
像after一样,before本身就能明确地表示时间的先后关系,故多数主从句均使用一般过去时,而无需使用过去完成时.例如：
Many people left for home before the film ended.电影尚未放完,许多人就起身回家了.
（4） 用在含有when的主从复合句中
由于when本身不能明确表示时间的先后关系,故先发生的动作应用过去完成时,后发生的动作只需用一般过去时.这样用过去完成时的可能是主句,也可能是从句.例如：
When all his money had been used up,Peter had to turn to a friend for help.当他的钱全都用光时,彼得只好转而求助于一个朋友.
有时,主句和从句的谓语动词的先后关系十分明确,两个动作紧接着发生,前一动作导致后一动作,这时两者均用一般过去时即可.例如：
When the meeting was over,we left the hall.散会后,我们就离开了大厅.
2.叙述几个连续的动作用法不同
在叙述两个或两个以上接连发生的动作用and,but,so或then等连接并按时间发生的先后顺序叙述时,只需用一般过去时.例如：
She entered the room,turned on the light and found everything stolen.
I lost my pen but soon found it.
She lost her pen,so I lent her mine.
但是,如果两个先后发生的动作不是按时间的顺序排列或叙述时,为明确动作发生的先后顺序,先发生的动作就得用过去完成时.例如：
The farmers were in high spirits because they had got another good harvest.农民们兴高采烈,因为他们又获得了一次好收成.
3.表示与过去还是现在相反的情况不同
一些表示心理活动的动词,如think,know,expect,mean,hope,want,suppose等,用一般过去时可表示存在于过去而非现在的心理活动或事与愿违的情况.例如：
I didn't know you were here.我不知道你在这儿.
而这些词的过去完成时则表示的是过去未曾实现的愿望、打算、想法或意图等.例如：
We had hoped that you would be able to visit us.我们原本希望你去看我们.
(二).who cannot name(cannot be named)
name做动词"命名"
这里是被动含义当然用被动态
没有被动语态的词:表示状态或特征的及物动词如contain,cost,fit,have,lack,suit等没有被动形式,另外,诸如happen,occur,take place,break out 等不及物动词或短语以及诸如result from(缘于),belong to,consist of等只用主动语态,而不用被动语态