She could not help thinking of a story about a man who_______ and robbed when he went to answer the door at night.
A.had been attacked B.would be attacked
C.has been attacked D.was being attacked
这题给出的答案是A，不过个人认为答案是错的。请问大师们知道这题答案应该是什么呢？选择的理由又是什么呢？谢谢帮助

第一题，一定是错误。是出题者改编一篇文章中的一句话，但理解出了差错，造成改编出错。原文如下：

He immediately remembered the story he had read about a man （who had been attacked and robbed） when he went to answer the door at night. ------------------其中when he went to answer the door at night其实是主句的时间状语从句，而非who从句的状语从句。但出题者领会错误，还自作聪明篡改句子主语为she,这样when从句就变成who从句的从句，造成了时态上的逻辑错误。

第二题，.Going for a short walk does more than________calories. Like most exercise, it also cuts your appetite.

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又查了一下，这里more than用法感觉像个副词词组，Going for a short walk does (more than) burn calories，而不是传统的比较用法了。所以选a，是有道理的。至于does有人解释为“助动词表强调”

具体解释，某网站上有，贴你看一下：
Step 3 Language Points:
1. Newspapers and other media do more than simply record what happens.报纸和其他媒介并不仅仅记录已发生的事情。
(1) 该句中的do是助动词，起强调作用，用以加强说话者的语气。
e.g. Do remember to remind me to return the book I borrowed from you.
(2) more than不仅仅；极为，非常；多于；难以；不能
e.g. She’s more than a teacher to us.
The boy more than smiled but laughed. 这男孩不仅是微笑，而是放声大笑了。
We are more than pleased with the results. 我们对结果极为满意。
He has more than 300 pictures.
This room is three time larger than that one.这个房间比那个房间大两倍。
The old man is two times older than I am. 这个老人的年龄比我大一倍。
That is more than I can tell. 那是怎么回事我实在难说。


至于第一题那个原文，网站不好贴，我直接贴原文吧：
Mr Price, the antique dealer, lived alone in a small flat above his shop. Because of the valuable articles which he kept, he was afraid that one night someone would break in and rob him. He had locks put on all the doors. Also, he had a cupboard made specially for keeping his valuable articles. But in spite of all these precautions, he never felt safe.
One night, he found that he had earned two thousand pounds that day, which was an exceptionally large sum. He thought of taking it to his son's house where there was a small safe, but it was a foggy evening and his son lived on the other side of the town. In the end he took the money home and put it in his wardrobe. Then, he locked it.
After midnight before he fell asleep, he was awoken by the long ringing of the shop doorbell. He sat up in bed. Could he have been dreaming? Surely, he thought no one could want to see him this hour of the night. He immediately remembered the story he had read about a man who had been attacked and robbed when he went to answer the door at night. The door bell rang again and again, more persistently each time.
Mr Price got out of bed and went across to the window. It was a policeman. "Sorry to disturb you, sir," said the policeman, "but there is a light on in your shop. I think you have forgotten to turn (it) off".