题目内容：

阅读下面短文.根据短文内容判断句子正误。正确的写“A”，错误的写“B”。

A king(国王) has a daughter. Her name is Christina. The king loves his daughter very much and he asks his people to be nice to her. Every day. Christina stands(站) on the castle( 城堡) wall, so people can be nice to her. But every day，only some people look up to be nice to her. No one waves(挥手) or smiles(微笑). Christina is not happy.

It's a fine day. Christina meets a girl. Her name is Lisa. Lisa waves and people waves back to her. They smile at her. too. They look very nice. Christina sees it and asks Lisa to the castle.

"People wave and smile at you. They look very happy. Why?" Christina asks.

"Because 1 wave and smile at them first," Lisa says.

After Lisa goes, Christina thinks for a long time.

A new day comes. Christina stands on the castle wall and waves. She smiles, too.  Lisa waves and smiles back. Some other people waves and smile back,  too. Christina is very happy. So she is nice to her people, She waves and smiles at them every day.

1.The king asks his people to wave and smile at his daughter.

2.Christina is unhappy because only some people wave or smile at her.

3.Lisa waves and smiles at people first so they are nice to her.

4.Christina waves and smiles at people and she is very happy at last(最后).

5.From the passage, we know we need to be nice first if we want people to be nice to us.