听力原文：W: Dave. （19)I'm going to the supermarket to pick up food and drink for Saturday'

听力原文：W: Dave. (19)I'm going to the supermarket to pick up food and drink for Saturday's picnic later. Any suggestions？

M: Well, (19)everyone has been talking about having a barbecue down by the river, so why don't you pick up some hamburger and hot dogs？

W: Okay, but how much hamburger meat are we going to need？ And hot dogs too？

M: Uh, I don't know. How about three pounds of hamburger and a couple packages of hot dogs？

W: Oh, that's not going to be enough. Do you remember the last picnic we went on？ Your roommate, Jim, ate about ten hamburgers by himself!

M: You're right. (20)Let's buy nine pounds of hamburger meat and seven packages of hot dogs then.

W: And you'd better pick up some chicken for those who don't like hamburgers or hot dogs.

M: Okay. How about five or six bags of potato chips？

W: Better make that eight or so.

M: Alright. Oh, and we're going to need some hamburger and hot dog buns. How about five packages a piece？ I think that sounds about right.

W: Yeah, you'd better pick up some mustard, catch up, and mayonnaise, too.

M: Okay. What else？ Uh, we're going to need some soft drinks. How about ten of those big 2-liter bottles？

W: Sounds tine, but be sure to buy a variety of drinks.

M: Okay. And what about dessert？

W: Well, maybe we could ask Kathy to make a few cherry pies as she did last time.

M: Well, I wouldn't mind that, but you know, she's been very busy working two jobs, so I'd hate to ask her. (21)OK, to be honest, I have broken up with her last week, and we haven't talked since then.

(20)

A．On Saturday by the lake.

B．On Saturday by the river.

C．On Sunday by the lake.

D．On Sunday by the sea.