关于基因突变的下列叙述中，错误的是

①A:Look at these toy animals, boys and girls.

B: Wow!

②A:Look at this cat, I like cats.

B: It's cute.

③A:I like dogs, do you like dogs, Su Hai?

B: Yes, I do.

④A:Do you like dogs, Mike?

B: No, I don't. I like pandas. They are cute and fat.

  They believe things will____ ____well．

下列句子中，没有语病的一项是  （     ）        

Safety must come first. During the coming summer vacation, some of us may travel to other places. To keep safe during the journey, we should      .  

     ①avoid eating raw(生的)and cold food

     ②obey the local traffic rules

     ③swim in the dangerous area

     ④never stretch our hands out of the window when taking a bus

     ⑤ tell strangers our personal information