A、He sees his sister very seldom. B、He sent Mark something on his 19th birthday. C、He always walked to work. D、He lives with his

(29)Some people don’t like anything to be out of  place. They are never late for work; they return their books to the library on time; they remember people’s birthdays and  they pay their bills as soon as they arrive. (29) Mr. Brown  is such a person. Mr. Brown works in a bank, and lives on  his own. His sister lives in the next town with her husband, and her son, Mark. Mr. (30) Brown doesn’t see his sister or her family from one year to the next, but he sends them  Christmas cards, and he hasn’t forgotten one of Mark’s seventeen birthdays.
    Last week Mr.  Brown had quite a surprise. He drove  home from the bank at the usual time; driving neither too slowly nor too fast, he parked his car where he always  parked it, out of the way of other cars, and he went inside to make his evening meal. Just then there was a knock at  tbe door. When he opened it, he found a policeman standing there. Mr. Brown asked himself.  "’ Have I driven on the  wrong side of the road? Has there been some trouble at the bank? Have I forgotten to pay an important bill?"
    (31)"Hello, uncle," said the policeman, "My name’s Mark. "