阅读下面短文, 在空白处填入一个适当的词, 或填入括号中所给单词的正确形式。
Last summer I got the chance to spend a month helping out in a hospital in Africa. I had one year left at school, and I was 1. (interest) in studying medicine at university.
It was a month that changed my life. I 2. (introduce) to a world that is very different to mine in so many ways. I was shocked at how poor so many 3. (family) over there are and how difficult their lives can be. But I was also surprised at how positively people spend 4. (they) daily lives.
The way they come together and help each other is a real inspiration, and something I think a lot of us here in the UK have forgotten. I think many of us don't realize 5.lucky we are. My work in the hospital was hard. Not only did I spend a lot of time cleaning floors, but 6. I got to spend some time looking after the patients. And I got the chance 7. (talk) to some doctors and ask them about the job. I saw some truly awful things in the hospital, 8. none of them changed my mind about being a doctor. 9. fact, they only made me more determined to do medicine!
When I finish, I know 10. I'm going to do: I want to work for an international organization like the Red Cross. I can't wait to get started.
On Nov. 11th, most products online in China are usually sold at the________ (最低的) prices.
Bill was ________ (踢) a ball in the yard when I saw him.
This is our classroom and________ (你们的) is across the hall.
Behaving________ (礼貌地) costs nothing, but it brings a lot.
Now all the e-bike riders in Ningbo________ (必须) wear helmets while riding.