地球上具有适宜生命存在的温度条件的原因主要是                  (      )

    One night, a mother and her daughter went out for dinner together. The mother was a heavy smoker, ____(make) her daughter feel very upset and worried. She would often tell her mother that smoking was very bad ____her health. But her mother wouldn't listen and refused to stop smoking.

    However, at ____(they) dinner that night, she noticed that her mother didn't have a single cigarette. As a matter of fact, she realized that she hadn't seen her mother smoke for ____ whole day.

    “I can see that you're not smoking at all today. Are you trying ____(give) up smoking?” the daughter asked hopefully.

    The mother answered, “No, I'm just feeling a little bit sick right now. I don't smoke ____(cigarette) when I'm sick, because if I do, it takes me ____(long) to get better.”

    The daughter____(reply), “Well, I guess you would____(probable) live a better life ____you got sick a bit more often!”