17．One day when Jack was walking in the park，he saw a woman he knew sitting on a bench（長椅）with a dog beside her．The dog was looking up at the woman．
Jack walked up to the woman and said，"Hello．Sue，how are you？May I sit and talk with you for a while？"
"Of course，please sit down，"Sue said．
Jack sat down next to Sue on the bench，and they talked quietly together．
The dog continued to look up at Sue，as if waiting to be fed．
"That's a nice dog"Jack said，pointing（指向）at the animal．
"Yes，he's handsome．He's a bit of a mixture（混合） but that's not a bad thing．
He's strong and healthy"
"And hungry，"Jack said．"He hasn't taken his eyes off you．He thinks you've got
some food for him．"
"That's true，"Sue said，But I haven't．"
The two friends laughed and then Jack said，"Does your dog bite？"
"No，"Sue said．"He's never bitten anyone．He's always gentle and good-tempered（好脾氣）．"
Hearing this，Jack decided to pet the dog．He put out his hand and touched the
animal's head．Immediately it jumped up and bit him．
"Hey!"Jack shouted．"You said he didn't bite．"
"No，I didn't，"Sue replied．"You asked，if my dog bit，and I said no．
51．What did Jack do when he saw the woman？B
A．He walked past her．
B．He asked to sit next to her．
C．He spoke angrily to her．
D．He spoke to her dog．
52．The dog lookedD．
A．a(chǎn)ngrily at Jack
B．sick
C．a(chǎn)s if he would bite Sue
D．hungry
53．Jack thought that the dogB
A．was ill
B．belonged to Sue
C．was terrible
D．belonged in azoo
54．The underlined word"pet"should beD in Chinese．
A．寵物
B．喜歡
C．敲打
D．撫摸
55．From the story，we can knowD．
A．Jack and Sue talked about the same dog
B．Jack asked Sue a right question
C．Jack was bitten by Sue's dog
D．Jack asked Sue a wrong question．
