[解析]
CB
M:Thank goodness!You' re back at last!
W:Sorry to have kept you waiting,but the roadside toilet is really disgusting!
M:That's the kind of challenge people often encounter on a road trip.
W:Yes.By the way,I' ve run out of our toilet paper.
M:The maps say there's a convenience store five miles away.We can buy some there.
W:And some snacks.I forgot to pack us some when we left home.I'm hungry now.
M:OK.Fasten your seat belt.Here we go!
W:Oh,man!Keep to the speed limit,or we' ll get a ticket!