1. Dr. Kleitman thinks that________

1. Dr. Kleitman thinks that________.A. getting up late in the morning means lazinessB. if your energy peak is in the evening, you might like getting up early C. people can do nothing about energy cycle D. spending some time yawning and stretching helps to keep you energetic 2. According to the passage, family quarrels may result from______A. the same energy cycle of family members B. unawareness of different energy cycles C. failing to get up early in the morning D. knowledge of energy cycles3. If you are used to getting up late in the morning, you are likely to be most energetic_______A. in the morning B. at noon C. in the afternoon D. in the evening4. What’s the likely relationship between energy cycle and body temperature?A. Energy cycle and body temperature are the same things B. The higher your temperature is, the less energetic you are C. The higher your temperature is, the more energetic you are D. There is no direct relation between them 5. Which of the following statements is not true?A. One can change his energy cycle once he makes up his mind B. We still don’t know why people have different energy cyclesC. Habit will help to make our life fit energy cycles betterD. If you rise earlier than usual, you will be more efficient at your low point in the morning