1 . I was talking with my old friend and I left my newly bought dictionary ______ on the bus. （用适当的单词填空）

2 . He arrived at school early in the morning，dragging his heavy instrument case across the campus to the pitying looks of the non-musicians he had left ___________________________.（根据句意填空）

3 . The plane is about to leave, but I have left my ticket________.（根据句意填空）

4 . If you don’t work hard, you will be left____________.（根据句意填空）