Mr. Smith is an English teacher. He comes from America. He has a daughter. Her name is Amy, and she is a good engineer in New York. Mr. Smith likes traveling very much, and he can speak Spanish very well. Now, he is in China, so he wants to learn some Chinese. He works very hard at his Chinese, and goes to Chinese classes every evening. He has a lot of friends in China and they often help him. He likes to talk with them. He tells his daughter that he can speak good Chinese, and he doesn’t have any trouble（麻烦） with his Chinese, but the Chinese have a lot.

浓硝酸和锌反应的化学方程式为Zn+4HNO₃═Zn（NO₃）₂+2H₂O+2X↑，则X为（　　）

在横线上填上恰当的关联词语。

①____我的诗写得很糟糕，____母亲仍一如既往地鼓励我。

②____母亲一直在鼓励着我，____我一直在写作。

③我们____要有来自母亲的爱的力量，____要有来自父亲的严格要求。

④____父母对我的评价是那么的不同，____他们的出发点是共同的，那就是对我的爱。

观察杏花的结构，回答下列问题：