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。

Everyone had a childhood. And childhood experiences are often very funny. Children often make us    小题1:(laugh). It’s true    小题2:children brighten up a home. They never turn off the lights.

I often recall my childhood, the years   小题3:   many interesting things happened. When I was a two-year-old child, both my parents were always very busy with their work. My mother worked   小题4:   a sales manager in a company while my father served in    小题5:  army. So I lived with my grandma in a village. I was always waiting for my parents at home. Once my father    小题6:  (send) us a photo of his in a soldier’s uniform,    小题7:  was posted on the table reminding me of him.

Once my mother came to see me and we went   小题8:  (shop) together. On the way we saw a group of soldiers. And when I saw them, I became very    小题9: (excite). I said in a ringing voice pointing to    小题10:  , “This is my father, and this is my father, and that is my father, too!”

My mother said she would remember that moment all her life.

目前，中国已经超过美国成为最大的温室气体排放国，成为全球气候赤字的（）输出者。

A.第三大

B.第二大

C.第四大

D.最大