阅读下面的短文，从每小题所给的A、B、C和D选项中选出一个最佳选项。

　　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．

本文叙述了“我”和Robbie帮助Sam去医院治病的经过，告诉我们同学之间应互相帮助。