根绝括号内所给的时间提示改写句子Lucy is a student of Grade Four.（last year）

英语翻译：关于样品。
1我们可以做这个label像第一次一样，并且根绝第二次样品的颜色。
2.根据第一次样品的做法也可以做折线。
3，关于这个Mesh backing ，需要你提供样品给我们。我们会根据你样品重新调整价格。

根绝文章回答问题
A man goes to a fasr-food restaurant for lunch."Hi",an assistant says,"May I help you?""Id like a hanburger,large fries,and a medium Coke."the man says."Anything else?"the assistant asks."No" the man answers."Is that to eat in or to take away?"The assistant asks,"To take away."the man says.
The man pays for his lunch.The man's assistant puts a lunch in the bag,The man takes the bag."Thank you" The assistant says,"Have a nice day."
The man walks to a park.He sits down and opens the bag,He is surprise.There is no hamburger in the bag.There are no French fries.There is no Coke.There is money in the bag--a lot of money!The man counts the money.Two thousand dollars!
Why is the money in the bag?The man doesn't know.Can you guess?
Why is the money in the bag?

天花和牛痘的故事 介绍了医生琴纳发明种牛痘根绝天花的过程.在这个研究过程中; （科学问题）
1：琴纳通过对天花受害者的观察分析,首先发现了什么问题：（ ）
2：针对发现问题,琴纳提出了什么猜想?（ ）
3：最后,琴纳通过（）的方法证明了上述猜想,人类由此获得了抵御天花的有效方法——种牛痘.
（科学问题）快,要上交的,快