阅读理解。
I was sleeping soundly last night when I was awakened by someone's groans (呻吟). I listened, and heard
it was from Sam, a student from Africa. I really wanted to go on sleeping, as I had insomnia (失眠) and had
just fallen asleep, but I couldn't because Sam groaned louder and louder, showing he was seriously ill.
At that time, Robbie, a student from China, also got up to help. We found some pills, got some water, and
helped him sit up to take them, hoping this would make his pain go down a little and get over the difficult time.
If only daytime would come soon, everything would become easier.
Things went contrary (相反) to our wishes. Sam's condition developed from bad to worse. We telephoned
the emergency service, and in no time an ambulance stopped in front of our gate. We helped the medical (医疗)
workers carry Sam to the vehicle, and then both Robbie and I got in and took Sam to the hospital.
We helped him go through many medical examinations. After all kinds of tests,we were told that the final
diagnosis (诊断) was appendicitis (盲肠炎). Luckily, Sam didn't need an operation because we brought him to
the hospital in time. He got timely treatment.
After Sam felt much better, we rushed back to prepare ourselves for the class. We were a little tired, but we
had certainly done something good, something right.
1. Why couldn't the writer go on sleeping that night?
A. Because he was too excited that day.
B. Because his roommates were watching football games on TV.
C. Because one of his roommates was sick and groaning.
D. Because he was sick.
2. What does "vehicle" in the third paragraph refer to?
A. Car.
B. Ambulance.
C. Taxi.
D. Bus.
3. Why didn't Sam need an operation?
A. Because Sam didn't have enough money for an operation.
B. Because Sam was sent to the hospital in time.
C. Because Sam was much afraid of having an operation.
D. This article doesn't tell us the reason.
4. Which of the following statements is NOT true according to the passage?
A. Sam, Robbie and the writer lived in the same room.
B. Sam was feeling very well after taking some pills.
C. Robbie and the writer also went to the hospital.
D. Robbie and the writer didn't sleep after they came back from the hospital.
SO2 
CaO＋CO2↑ 
CO2＋H2O 
2KCl＋3O2↑