用括号内所给单词的适当形式填空
（1）What a____ (please) it is for me to play the piano with you!
（2）Mother asked the Greens to help____(they) to some pears.
（3）Tim sings even____ (badly) than before.
（4）He felt____ (true) sorry for what he said.
（5）____ (clean) work is to make our city clean.

“车让人，让出文明；人让车，让出安全；车让车，让出秩序；人让人，让出和谐。”这一标语的内容（  ）
①符合社会主义精神文明建设要求
②是构建和谐社会的需要
③体现了平等待人、尊重他人、宽容的交往原则
④可以避免一切交通事故的发生