Mark was a student at this university from 2006 to 2011，________he studied very hard and was made Chairman of the Students’ Union.

A．during which time   B．for which time      C．during whose time   D．by that time

Earlier this morning I e-mailed an old friend, Mark. We have been out of touch for 12 years, but the   36  is a wonderful thing. Finding his e-mail address   37  less than a minute. He is working on his doctoral paper in western America.
Mark and I met at a summer   38  that we both attended. I went every year from the time I was 8 or 9 until I was 15. I don’t   39  exactly, but I think Mark was there for as many years as I was.
We lived close to each other and   40  saw each other around the campsite, but not often. Mostly we stayed together for a week or two in the   41  and wrote letters back and forth during the rest of the first few years. I still have all of his letters in a box somewhere. I come across them occasionally and   42  to sit down and read through them, but I never have. He was a   43  and precious friend to me, and I am deeply   44  that we have drifted so far apart.
Mark was a very kind and incredibly bright and funny   45  . He loved Monty Python — I mean he was a fanatic(狂热者), and could   46  entire movies from memory. He was one of those kids who   47  such a unique and powerful mind   48   they never quite fit into the main stream of life.   49  Mark, who I believe realized that, never seemed to care about it. When I knew that Mark was working on his   50  (on a highly intellectual and fairly mysterious and difficult topic), I thought, “Well yes, of course.” He is just where I would
  51  him to be.
I wonder if he will write me back. I wonder if he will be   52  by where I am. I wonder whether he and I can be   53  again, or whether these years have left us with   54  
in common. I wonder whether he can ever be the man I   55 , or only remain the boy I knew.  

Mark was walking home from school one day when he noticed a boy ahead of him. He had tripped (绊倒) and dropped all of the books he was carrying, along with some clothes, a baseball bat and a glove.
Mark knelt (跪) down and helped the boy pick up the things. Since they were going the same way, he offered to carry some things for the boy.
As they walked, Mark discovered the boy’s name was Bill. He loved video games, baseball and history, but he was having trouble with some of his subjects.
They arrived at Bill’s home first. Mark was invited in for a Coke and to watch some television. The afternoon passed pleasantly with some laughs and talk. Then Mark went home.
They continued to see each other around school, had lunch together once or twice, then both graduated from junior school.
Three days before graduation, Bill asked Mark if they could talk.
Bill reminded (提醒) Mark of the day years ago when they had first met. “Did you ever wonder why I was carrying so many things home that day?” asked Bill.
“You see, I took away all my things from school. I had stored away some of my mother’s sleeping pills (安眠药). I was going home to kill myself. But after we spent some time talking and laughing, I realized that if I had died, I would have missed so many good times. So you see, Mark, when you picked up those books that day, you did a lot more._____________________”
【小题1】When Bill fell down on his way home, Mark ________.

Mark was a student at this university from 1999 to 2003, _______ he studied very hard and was made Chairman of the Students Union.?

A. during which time

B. for which time

C. during whose time

D. by that time?

Mark was a student at this university from 1999 to 2003, ________ he studied very hard and was made Chairman of the Students' Union.

1. A.
   during which time
2. B.
   for which time
3. C.
   during whose time
4. D.
   by that time