阅读理解。 Leo was a little boy. He was very frightened of ghosts. One morning, when he was having breakfast, his elder brother Sammy said to him, 'Leo, last night I saw a ghost boy in our house!' Hearing this, Leo began to cry. 'What is the matter?' asked Leo's mother. 'I'm scared!' cried Leo. 'I don't want to share our house with a ghost! I'm staying awake all night tonight!' 'He's not scary, really, 'explained Sammy. 'He is very kind and helpful. You don't have to worry.' At 9 o'clock that night, Leo's mother told him to get ready for bed. 'Good night. Leo.' she said. 'Sleep well!' Leo lay there in the darkness wide awake. Sleep was impossible. Suddenly, Leo felt as if someone was watching him. He looked around, but he couldn't see anything. He lay back down. Then he heard a boy's nice voice. 'Go to sleep. Close your eyes, please.' Leo closed his eyes and began to relax. 'There, there,' said the voice again. 'It is time for sleep now. Sweet dreams, Leo.' Within a few minutes, Leo was fast asleep. At this time, Leo's mother saw Sammy walk secretly out of Leo's bedroom. 1. Which word has the same meaning as the underlined word 'frightened'? [     ] A．Excited. B．Happy. C．Sad. D．Afraid. 2. When did Leo fall asleep that night? [     ] A．At 9 o'clock. B．Before 9 o'clock. C．After 9 o'clock. D．At 8:30. 3. Why did Leo fall asleep quickly? [     ] A．Because he was too tired. B．Because he liked sleeping. C．Because a voice made him comfortable. D．Because his bed was comfortable. 4. Who do you think may be the ghost? [     ] A．Nobody. B．Sammy. C．Leo's mother. D．Leo's father. 5. Which of the following is NOT true according to the passage? [     ] A．Leo was a brave little boy and he wash't scared of anything. B．Leo told his mother he wouldn't sleep that night. C．Sammy told a lie and there wasn't a ghost at all. D．Leo's mother knew the fact at last.