Mark Twin was a(an) American writer.One day he went to a city by
train,he wants(wanted) to see one of his friend(friends),he was busy and often
forgot something.When he was on the train ,the conductor asked
him his ticket.Mark Twin look(looked) for his ticket.But he could not
fine(find) one(it).The conductor knew him and said,“Show me his (your)ticket
on your way back .If you can (can't)find it ,it doesn't matter.”
“Oh ,but it does.”Said Mark Twin,“I must to (no to)find it .If I
can't ,how can I know what(where) I'm going.”