閱讀測驗　  A marathon is a race with a distance of 42.195 kilometers (公里). The distance was used and decided at the 1908 Olympics in London. That is, a race could be called a marathon only if the distance of the race is that number. A marathon is usually run on the roads, and it can also be held in the mountains or in urban (城市的) areas. No matter where a marathon takes place, both energy (體力) and determination are needed.A marathon is also used to mean something that is very tiring and takes a long time. For example, if a meeting lasts much longer than usual and makes people feel like sleeping, then we can say the meeting is a marathon.
【題組】43.What does that number in the first paragraph mean?
(A) The year 1908 when the Olympics was held in London.
(B) The distance of 42.195 kilometers.
(C) The number of the participants in a marathon.
(D) The best result a marathoner once got.