When we compare ourselves with great people, we may feel very ordinary(平凡的)and unimportant．However, we must remember that those great people were extraordinary(卓越的)．The world has more than 6 billion people, so it is difficult for all of us to be extraordinary．What can we do?We can try to be the best people that we can possibly be．

　　①think this means that we need to be honest and hard-working．We also need to be open-minded and kind to other people．Most importantly, we need to be ambitious(有雄心的)．We need to always set goals for ourselves and work hard to achieve these goals．

　　Madam Curie and Thomas Edison were hard-working, kind and ambitious, and they worked hard to achieve their goals．Curie gave her life to“ease(减轻)human suffering”．Edison spent his life as an inventor．He invented a camera that showed movement．Later people used cameras to make modem films．

　　A famous writer from Ireland once wrote,“We are all in the gutter(社会底层)but some of us are looking at the stars．”②I often come up with this when I am unable to achieve something．It reminds me that we are all at a lower level and that we all have a higher goal to work towards．It makes me try to be the best person that I can possibly be．

1．Is it difficult for all of us to be extraordinary according to the passage?

2．What did people use cameras to do later?

3．What is the best tide of this passage?(within ten English words)