用所给单词的适当形式填空，未提供单词的根据上下文填入适当的词。Mary's secret

Mary got home very late these few months. Her parents were very  ____ (worry). But when they asked

Ker about that, Mary always had different  ____ (excuse). Her father wanted to find out ____ happened to her.

One day after school, Mary's father secretly followed her to a park. Mary sat down ____. began to paint a picture alone. Her father, stood far away and watched her ____ (paint).

“This little girl comes here to paint every day. I think she  ____ (love) painting,” the cleaner there told him. Her father felt sorry, because he had never wanted ____ (understand) what his daughter liked. He and his wife thought painting was____ waste of time and never supported her. They thought Mary should focus more  ____ her studies, especially science. They only wanted to make her a doctor or an engineer. Now he realized what Mary liked

____ (much) of all her subjects. Her father was moved and changed his mind.

    Enough sleep is important to health. The amount of sleep needed depends on the age of the person and the conditions in which sleep takes place. The young may need more sleep than the old, but usually eight hours are enough for the health of grown-ups. Some can do with less than this amount, but others may need more. Every person knows his own need. It is then a matter of good judgement to satisfy his need. Sleep should always be enough to make one bring back his strength and get ready for a day's work.

    Fresh air is necessary to sound sleep. It is not without reason for some people to think that it is practicable to sleep in the open air. When one can keep himself warm, out-of-door sleeping probably gives the body its most complete relaxation (放松).

    Ability (能力) to sleep lies largely in habit. The conditions referred to only lead to sleep. Out-of-door exercises, a good habit of regular hours and the avoidance (避免) of late eating and worry, which are largely within the control of any person, are all helpful to sound sleep.

    A bath at bedtime, neither hot nor cool but of body temperature may be helpful to sleep. Sleep-producing drug (药) should never be taken except when suggested by a doctor.