阅读下列短文，从每题所给的四个选项A、B、C、D中，选出最佳选项。

    "Well, we're in our new house. Let's get a new pet." Mrs. Brown said to her husband.

    "That sounds a good idea," he answered. "Maybe we can see the ads (广告) in the newspaper."

    "Let's go to the animal shelter. Many pets there need homes. Tomorrow is Saturday, we can go together," she

said.

    The next morning, the Browns met Mr. Snow at the animal shelter. "We want to be sure that the pets here go

to good homes," Mr. Snow said. "So I need to ask you some questions." 

    After they talked for a while, the Browns planned to get a small dog. It wouldn't need a big house or a big

yard (院子). A small dog would bark and warn (警告) them if someone tried to come into their house. After

Mr. Snow gave the Browns a book on pet care, they chose one and wanted to take her home right away. But the

animal doctor needed to check her. So Mr. Snow told them to come again on Sunday. On Sunday afternoon the

Browns went to the animal shelter. The animal doctor said, "Shadow has had all of the shots (预防针). She will

be healthy." The Browns thanked the doctor and took Shadow home.

1. From the reading we know that ________. [ ]

A. the Browns live in a small house

B. the Browns knew about Shadow from the newspaper

C. Shadow is a small dog

D. Mr. Brown didn't need a pet

2. "Animal shelter" in the passage means ________. [ ]

A. a place to sell small dogs

B. a place to keep animals that have no homes

C. a place to study animals

D. a place to sell books on pet care

3. Mr. Snow asked the Browns some questions to ________. [ ]

A. see where they lived

B. find out how rich the Browns were

C. know where they would keep their new pet

D. make sure they would love pets

4. The Browns think that a small dog ________.  [ ]

A. doesn't run quickly

B. eats less food than a bigger one

C. can help them keep their house safe

D. usually has a beautiful name