1. Tom's calculating ability has been very poor since he started his bad sleeping habits. He just cannot focus his mind on numbers. Two weeks ago, as a result, he got the lowest score on his Mathematics mid-term test. 2. Tan is fifteen years old, but he stands only 120 centimeters and weighs just a little over 30 kilos. Doctors say his body has stopped growing. 3. Tim cannot play basketball as well as he used to. He has been weak and slow, finding it hard to move any part of his body 4. Tong has been very impatient lately. He gets angry at any minor matter that displeases him. He complains and easily becomes grouchy when someone asks him questions 5. Toy keeps tossing his head and turning his body, trying to fall asleep but is unable to do so.