用please,pleasant,pleased,pleasure填空

用please,pleasant,pleased,pleasure填空
谁能帮我填下下面的空,并且帮忙把每句翻译一下,然后再说明一下为什么填这个词,用的语法是什么?
1.It ia a( )way to make cities beautiful.
2.Our teacher was very( )with us.
3.It's a ( )to help others in trouble.
4.Will you( )bring your book to me?
第1题前面是It is 不小心打错了！