下面的句子摘自2021年高考英语新全国卷Ⅱ语法填空题：

I kept going. Whenever I heard of businesses using plastic, I’d send an email. One of the biggest companies I wrote to was Alaska Airlines. A company representative wrote back and told me the airline was switching over ______ plastic to paper cups on all of its 1,200 daily flights.

空白处应该填什么？有的书上提供的答案是 from，有的书上提供的答案是 the，不知哪个才是对的？

附全文如下：

阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

I’ve always loved the ocean. In the ___56___ (seven) grade, I started volunteering at the Monterey Bay Aquarium in California. I was upset to learn that many sea animals eat plastic garbage, ___57___ (think) it is food.

I decided to do something ___58___ (educate) people about this problem. I held presentations at schools to teach kids about plastic waste. I wanted to reach businesses too. I decided that if I learned of a company ___59___ used a lot of plastic, I’d send it an email urging it to cut back.

One day, I saw a commercial for a health-care company. People in the ad were using plastic straws (吸管). I found the contact information of the company ___60___ emailed its president. I told him how ___61___ (harm) plastic could be to the environment and asked him to consider using more eco-friendly options. I was so___62___ (excite) when he wrote back to me. He said he would make sure that the company cut its use of plastic straws in half.

I kept going. Whenever I heard of businesses using plastic, I’d send an email. One of the biggest companies I wrote to ___63___ (be) Alaska Airlines. A company ___64___ (represent) wrote back and told me the airline was switching over ___65___plastic to paper cups on all of its 1,200 daily flights.