1 . Though ______(leave) behind, Jack kept on running until he reached the finishing line. (所给词的适当形式填空)

2 . When the passengers get off the bus, they are reminded not to leave any of their belongings   ________. (用适当的词填空)

3 . I believe what a person should leave __________ to the world is truth—something true. (用适当的词填空)

4 . By opening a novel, I can leave_________ my burdens and enter into a wonderful and mysterious world where I am now a new character.（用适当的词填空）