A、They hired someone to stay in their home. B、They left their pets with their relatives. C、They rented their house to a student.

M: (9) Hey, any idea of what to do this summer vacation? There doesn’t seem to be any jobs available.（ 男士问女士暑假有没有工作可作。可见他暑假想要打工挣钱。）
W: Why don’t you try house-sitting? (10) Last summer my friend Marsha house-sat for the Howards when they went away on vacation. Mr. Howard hired Marsha to stay in their house because he didn’t want to leave it empty.（Howard 夫妇让女士的朋友Marsha 住在他们度假期间住在他们的房子里。）
M: You mean the Howards paid Marsha just to live in their house?
W: It wasn’t that easy. (11) She had to mow the lawn and water the house plants. And when Eric house-sat for Dr. Cohen, he had to take care of her pets（. Marsha照看房子的时候要修剪草坪，给植物浇水，Eric 托管房子时还要照看宠物。）
M: House-sitting sounds like a good job. (11) I guess it is a little like baby-sitting — except you take care of a house instead of children（.房屋托管有些像看孩子，只是你要照看的是房子而不是孩子。可见看孩子不在房屋托管的范畴内。）
W: The student employment office still has a few jobs posted.
M: Do I just have to fill out an application?
W: (12) Margaret and Eric had the interview with the homeowners and provided three references each.（房主要对房屋托管者进行面试，而且要求推荐函。）
M: That seems like a lot of trouble for a summer job.
W: Well, the homeowners want some guarantee that they can trust the house-sitter. You know they want to make sure you’re not the type who’ll throw wild parties in their house, or move a group of friends in with you.
M: House-sitters who do that sort of thing probably aren’t paid then.
W: Usually they’re paid anyway just because the homeowners don’t want to make a fuss. But if the homeowner reported it, then the house-sitter wouldn’t be able to get another job. So why don’t you apply?
M: Yeah, I think I will.
Questions 9 to 12 are based on the conversation you have just heard.
9. What does the man plan to do this summer?
10. What did the Howards do when they went away last summer?
11. What is the duty the house-sitter probably wouldn’t have to take?
12. How do homeowners decide to hire a house-sitter?