根据短文内容, 回答下列问题。
    Lin Hai is thirteen. He's a student in a school in Tianjin. He gets an e-mail from Tom White. Tom is a student in the USA. Here is the e-mail.
Dear Lin Hai,  
    My name is Tom White. I am from New York, USA. I am fourteen years old. I'm a schoolboy. I want to make some friends in China.
    There are eleven boys and nine girls in my class. We come from different countries—Japan, the USA, the UK and Canada. But at school we all speak English. My parents are from France (法国). They speak French and English, so I can speak English and French well. But I want to learn Chinese. Can you help me? There are many Chinese people in New York and I want to talk with them.
I can play chess well, and I can play many sports. How about you?
Please write to me soon.
Yours,  
Tom

如图，在△ABC中，点O是∠ABC的平分线与线段BC的垂直平分线的交点，OD⊥BC，OE⊥AC，OF⊥AB．垂足分别为D、E、F，则下列结论不一定成立的是（   ）

— Do you like this shirt?
— Yes, ____ I don't like the color.

If you don’t go hiking,  ____ I.

经济学中著名的“丰收悖论”是这样表述的：“（在完全竞争的市场上）如果某一农场主获得丰收，他的农场的收入会增加；如果所有农场主的收成都破丰收记录的话，则他们的农场收入都会下降。”“丰收悖论”反映了