阅读短文，将下列句子补充完整，每空一词。
Mr Green works in a hospital. He is busy driving a car every day. His wife works in a school library. She's
strict with her only son, Tommy.
Half a year ago, when Tommy was six，Mrs Green took him to her school. The boy was clever and
studied well. But at first he couldn't adapt (使适应) himself to the new life. In the morning, he woke up late and
in the evening he didn't go to bed on time. But his mother tried to make him do everything on time.
One evening, when Mr Green was driving in a street, a traffic accident happened. He had to take the
wounded (受伤的) people to the hospital and it took him about two hours. When he got home, he began to tell
his family about it. "It's time for you to go to bed, Tommy," said Mrs Green. The boy wanted to listen to his
father tell the accident, but he had to do what his mother told him. When he lay down, he said, "I don't think
Mom can look after me at all" "Oh, why?" asked his father.
The boy said, "she always makes me go to bed when I am not sleepy (困的), but she wakes me up when
I'm asleep.
1. Mr Green works in a hospital. He is a _____.
2. Mrs Green works in a _____ .
3. Tommy's mother wants to make him go to bed and get up on _____ .
4. One day, Tommy's father went back home late because an _____happened.
5. Tommy's mother often wakes him up when he is _____ .
，物体所受到的合力为（ ）
