C
Jeff has a pet. It's a dog. It's white. Jeff likes it very much. He thinks the dog is very smart. It can play ball games and it can buy newspapers(报纸) for Jeff. Every morning, Jeff puts one dollar into the dog's mouth and it goes to the shop to buy newspapers for him.
Jeff has a good friend—Mark. Jeff tells Mark about his smart dog. Mark doesn't believe it. Today, Mark comes to see Jeff in the morning. Mark says, "I can give your dog money. I don't think it can buy newspapers."
"Have a try(试一下)," says Jeff.
Then Mark puts money into the dog's mouth and the dog walks out. After an hour, the dog doesn't come back. "How much money do you give the dog?" Jeff asks. "Five dollars." "That's too bad!" says Jeff. "It is watching a movie(看电影) now!"
()46. What colour is Jeff's dog?
A. White. B. Red. C. Yellow. D. Black.
()47. From the passage, we know the dog .
A. isn't smart B. can't play soccer
C. takes money with its mouth D. gets up early in the morning
()48. The underlined word "believe" means "" in Chinese.
A. 承诺 B. 相信 C. 回答 D. 担心
()49. Mark gives the dog dollars.
A. five B. one C. three D.six
D

46.A 解析:细节理解题。根据第一段前三句“Jeff has a pet. It's a dog. It's white.”可知,杰夫的狗是白色的。故选 A。
47.C 解析:细节理解题。根据第一段最后一句“Every morning, Jeff puts one dollar into the dog's mouth and it goes to the shop to buy newspapers for him.”可知杰夫的狗用嘴叼钱。故选 C。
48.B 解析:词义猜测题。联系下文“Mark says... I don't think it can buy...”可知,此处表示马克不认为杰夫的狗会买报纸,所以他应该是不相信。故选 B。
49.A 解析:细节理解题。根据最后一段中的“How much money do you give the dog?”及“Five dollars.”可知,马克给了狗五美元。故选 A。