那位大哥知道大学英语课文中的重点句子,请留下几句,小弟在此先谢了.

1.Learning a foreign language was one of the most difficult yet most rewarding experiences of my life.
2.Not lnly did learning another language teach me the value of hard work ,but it also gave me insights into another culture .
3.Everyone has the right to live where he wants to ,regardless to the color of his skin.
4.We will not have the picnic unless more people sing in .