阅读以下材料并完成要求：国家人口和计划生育委员会副主任王培安4月14日在纽约联合国总部表示：“今后20至30年，中国将先后迎来劳动力人口、总人口、老年人口三大高峰。”据些完成下列问题：

$\sqrt{{\left(-2\right)}^2}$的值等于（　　）

完形填空。

    Tom and his father are 1 in the playground. There is a cat and a dog there.  They are playing with a ball together. “I think the cat is 2 than the dog," Tom says, “I don't think so," his father says. “Why?"  “Because the dog looks 3 than the cat " Tom laughs and says, "But I like the cat.  It is white and it is 4 than the dog. " Tom's father says, “Dogs are my favourite animals because they are very 5 to me " "Yes, but I like smaller ones. Can we keep one?" Tom says. "of course," Tom's father says.