听力原文：M: How do you and your housemates like the new co-op？ I'm thinking of joining it

W: We like it quite a bit. We get some very fresh produce and bulk staples of fair prices, but it certainly hasn't saved us time.

M: Then, what's for？

W: Well, the co-op doesn't carry everything, such as cleaning supplies, battery, that sort of thing. I wish the co-op sold those items.

M: What do members have to do？ Just pay a membership fee？

W: Yeah, there's a fee and a meeting, but the attendance isn't required. But we do have to work there for an hour every week, which isn't too bad.

M: I wouldn't mind working there some time. You get to learn about the products. But is the food free of additives？ That would be the main reason I join. I'm a convert (皈依者) from junk food.

W: Well, a lot of food is pure and pesticide-free. They also have vitamin supplements, and soy and tofu, and that kind of thing.

M: I'd like to try just for a month or so. Do they have trial membership？

W: Their shortest membership time is one month. Then if you like it, you can join for longer periods and it becomes cheaper.

M: Could you give me some details about the longer periods of membership？

W: Oh, I can't remember the exact regulations, but a six-month membership costs almost as much as five individual months.

M: Sounds pretty easy. Maybe the next time I mn into you, it will be in the checkout line at the co-op.

W: Yeah, if you are interested in it, just join it!

M: I will. Thanks a lot.

W: Not at all.

(23)

A．Membership in a co-op.

B．The benefits of health food.

C．Shopping in the supermarket.

D．The current cost of food.