a:hello !may i speak_ to david?
b:yes .who's that_?
a:This_ is lucy.could i borrow your bike again?
b:of course.has your bike_ broken again?
a:no,i 've broke_ my key to the bike.but i 'll have to go to see_ a friend.
b:i see .when will_ you be back?
a:about six's clock.
b:ok.i hope everything goes_ well.bye!have_ a nice day_ bye