4. Dear Director（鄉長）Wang,
         I’m Jack Chang, a member of Green Town. We are happy to have a nice, comfortable town since youare our director. Thanks. However, something is changing.
         Several weeks ago, I was told there were great snakeheads in the river in the park. These days, moreand more great snakeheads were caught. What’s even worse, a piranha was caught yesterday!
         That park with a lot of tall trees and a river through it is people’s favorite place in their free time.People like taking a walk or playing with their children there. Some people enjoy fishing in the river.Sometimes some children play in it. But the nice time perhaps will be changed by the great snakeheads andpiranhas. Great snakeheads and piranhas are notorious. Great snakeheads will eat up all the other small fish.Humans may be attacked by these big fish when they get too close to these fish’s nest (the fish’s home).Piranhas are more terrible, and they attack children more often. Action must be taken for these twodangerous animals.
        Great snakeheads and piranhas, in fact, are safe for eating. So why not hold fishing games several timesa year in the park and have snakehead and piranha cooking parties at the same time? People can enjoyfishing and delicious fish dishes, and more importantly, the number of those fishes will be reduced year byyear if we keep doing so.
         Surely, holding these games and parties needs your help. As the director of Green Town, I ask you totake my ideas into consideration（考慮）, and I am sure all the members of Green Town will join them happily.Thank you for your attention（注意）to this serious problem.
Sincerely,
Max Kennedy
【題組】48.The writer writes about some points in the letter:a. Ask the Director for help.b. Offer some answers to the problem.c. Talk about the problem of the park.In what order（順序）does the writer talk about his points?
(A) a→c→b.
(B) c→b→a.
(C) c→a→b.
(D) b→c→a.