Many things we eat or drink can affect our 【C16】______ . Drinks containing alcohol or caffeine can block sleep. 【C17】______ can some medicines. Other causes of insomnia include breathing problems or sudden, uncontrolled body movements during sleep. Because insomnia has so many causes, not all treatments are 【C18】______ for everyone. But experts have offered some simple ideas that work for most people. If 【C19】______ to sleep, they say, get up and go to another room, if possible. Stay up until you are really 【C20】______ , then return to bed. Get sip at the same time every day. Do not exercise just before going to bed. And, do not worry about past problems or future plans.
【C1】______