Stewart，a California vet at an animal shelter，makes calls to pet owners who have no place to call home again.He has his own practice in town，yet he still finds time for street pets.He's helped roughly 400 animals since 2011，mostly dogs but also a few cats.
   It a11 started in 2011，and the Great Recession（大蕭條）had spilled a lot of unfortunate people onto the streets.A small dog sat in a homeless man's lap.Stewart noticed its signs of an allergic reaction to fleas.He approached the man and offered to bring flea medication for the dog's skin.The man said after the treatment，his dog was soon restored to health.
   Since then，Stewart has often been found wandering dark alleyways（小巷）and underpass，anywhere he thinks the homeless might be camped out.Stewart pays for almost a11 of the expenses out of his own pocket.
   As for the question whether the homeless should even have pets，Stewart determines that more than anybody，they need a pet and deserve a pet and the owner is the pet's home.There's one more pressing reason for the homeless to have their pets."I can't tell you how many times people told me their animals are their reason for getting up in the morning，"Stewart says.
   One of those people is Joe，a white-haired middle-aged man who has landed on rough times.He says that his black-and-white mixed breed is his life."When I first hit the streets，I was almost to the point where I had given up，"he says."It is so lucky to have somebody like Dr.Stewart come out here to take care of my dog，which matters a lot".
   "When you give back，there is something you get in return that feels much larger.I knew I wanted to keep doing it，"Stewart says.

（1）What's Paragraph 2 mainly about？

D

D

A．The unexpected financial crisis in 2011.
B．The medical treatment to homeless pets.
C．The motivation for Stewart's being a street vet.
D．Steward's encounter with his first street pet patient.
（2）What can be inferred from Paragraph 4？

A

A

A．Some homeless people are in need of pets' company.
B．The homeless are incapable of attending to their pets.
C．Steward is devoted to practicing medicine in the street.
D．People have a negative attitude to the homeless having pets.
（3）Why does the author mention Joe in the text？

B

B

A．To show sympathy to the homeless.
B．To argue for the significance of pets.
C．To give credit to what Stewart did.
D．To call on people to care for the homeless.
（4）What does Stewart's story try to convey？

B

B

A．It's never too late to mend.
B．Street pets serve as life savers.
C．Small deeds make a big difference.
D．A friend in need is a friend indeed.