He must have attended the meeting yesterday,___________  he?

$\sqrt{16}$ 的平方根是____，﹣ $\sqrt{3}$ 的相反数是____，|1﹣ $\sqrt{2}$ |=____．

中国人民银行征信中心与最高人民法院等八家机构签订信息采集合作备忘录，对法院判决后有钱不还的被执行人实施出入境、银行贷款限制等信用惩戒。这告诉我们（    ）

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

What do ____ want?