阅读理解。 The following are four kinds of medicine at home. We should know how to use them. Never make any mistakes. (1) Take the medicine with water. One pill (片) every eight hours. For further nighttime and every morning, take two pills at bed time. Don't take more than six pills in 24 hours. For children six or twelve years old, give half the adult dosage (剂量). For children under six years old, go to ask your doctor. Take less dosage if restlessness or sleeplessness happens. (2) Each pill of the medicine is taken three times each day for persons more than 14 years old. As usual, a pill 6:00 a. m. before breakfast, one before 11:00 and one before sleep. Not for children under six years old and old persons with heart trouble. (3) The medicine is for a person with a cough. Once two pills a day before sleep for adult. Not take the medicine without cough. Half for children under 12 years old. Children with a bad cough, go to see a doctor. (4) The medicine is taken three times a day. Once five pills for an adult with a cold. Half the pills for children under 10 years old. Take the medicine before three meals or before sleep. 1. If a person can't rest and sleep very well after taking the first kind of medicine, he should ________. A. take less dosage B. take more dosage C. take two pills at bed time D. take it again without water 2. If a middle-aged person with a cough wants to be well at home, he'd better ________. A. take three pills before sleep B. stop to take some more pills C. go to see the doctor D. take two pills of the third kind of medicine before sleep 3. ________ can't take the second kind of medicine. A. Children over 12 years old B. Some adults 18 years old C. Some old persons with heart trouble D. Child over 7 years old 4. When an adult has a cold, he had better ________. A. have about over 14 pills of the fourth kind of medicine a day B. have six pills of the fourth kind of medicine twice a day C. have five pills of the fourth kind of medicine four times a day D. have nine pills a day 5. If a boy under 10 years old needs to take the fourth kind of medicine, he has ________. A. a cold B. a cough C. a serious illness D. sleeplessness