根据短文内容和所给汉语提示，写出短文空白处各单词的正确形式。每空限填一词。

Dear Peter,

     Hello! My name is Tony. I am 1_______ ( 十) years old. I'm from China, and I live in the north of Canada.

It is winter 2______ (现在) and the temperature is -20℃. It often 3______ (下雪) here. There is thick ice on

the river. It is very cold but my friends and I often play 4______ (足球). It is my favorite sport. I have three

5______ (狗). They are lovely. They are all 6______ ( 白色的). They often 7______ (跑) after me. My

favorite food is 68______ (鱼) and chips. There are five people in my family. We 9______ (讲) Chinese at

home, and we can all understand English. My English teacher helps me with this letter. Please write to me

about you and your home. 10______ (最好的) wishes.

                                                                                                                                        Tony

营林的生产成本通常是以能够提供商品材的( )的营林成本作为依据。

A．优等宜林地

B．劣等宜林地

C．中等宜林地

D．任意宜林地