-223×(-23)2=-43×49=-1627；
-24÷（-2）2=-16×14=-4．
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
What on earth does happiness mean? I can’t give you its exact definition, but I’m sure if you love and help 小题1: , you’ll get it.
I’ll never forget an old lady. She lives in 小题2: small house alone. It is said that her husband and her son 小题3: （die）in a road accident years ago. Her life is bitter, but she often helps others 小题4: a smile. Whenever it snows, she is always the first to clean the paths. She looks after several children living nearby. I am one of them. I often remember the stories she told us and her kind smile. Perhaps she is unlucky, but I think she is a happy person. Her life is full of小题5: （laugh）and love.
But I’m sad to see some people getting their happiness in bad ways. They talk 小题6: （noisy）in cinemas and meeting rooms; they destroy trees to enjoy themselves and they laugh at others’ shortcomings. Perhaps they feel happy at that time, 小题7: they will never get true happiness because they 小题8: （lose）their personality already.
Now I know what happiness is. 小题9: means kindness, love and unselfishness. Above all, I have come to understand that小题10: （bring）happiness to others is getting ourselves happiness.
莫衷一是mò zhōng yī shì
