1. (2019·成都模拟) 听下面一段较长对话，回答以下小题。

Hello, Susan, this is Dave speaking.<br />It's really hard for me to figure out what to buy for Saturday's picnic.<br />Why not pick up some hamburger meat, bread and hot dogs?<br />Okay.<br />How about two pounds of hamburger meat, some bread and three packages of hot dogs?<br />Not enough.<br />Do you remember the last picnic we went on?<br />Our colleague Lucy ate about seven hamburgers by herself.<br />I think you need to double everything.<br />Thank you.<br />I'll note that down.<br />What else do we need?<br />Don't forget soft drinks.<br />Be sure to buy a variety of drinks.<br />Okay.<br />Thanks for your advice.<br />Seems everything is ready.<br />See you on Saturday.<br />Hello, Susan.<br />This is Dave speaking.<br />It's really hard for me to figure out what to buy for Saturday's picnic.<br />Why not pick up some hamburger meat, bread and hot dogs?<br />Okay.<br />How about two pounds of hamburger meat, some bread and three packages of hot dogs?<br />Not enough.<br />Do you remember the last picnic we went on?<br />Our colleague Lucy ate about seven hamburgers by herself.<br />I think you need to double everything.<br />Thank you.<br />I'll note that down.<br />What else do we need?<br />Don't forget soft drinks.<br />Be sure to buy a variety of drinks.<br />Okay.<br />Thanks for your advice.<br />Seems everything is ready.<br />See you on Saturday.

1. （1） Why does the man call the woman?

   A . To send an invitation. B . To ask for help. C . To make suggestions.
3. （2） How many packages of hot dogs do they decide to buy?

   A . Three. B . Six. C . Seven.
5. （3） What is the probable relationship between the two speakers?

   A . Husband and wife. B . Brother and sister. C . Fellow workers.