1. Sleep is an 1_ part of good health. It helps you to feel good, work 2_. 2. Even mild sleeping problems can make daily life more 3_ and less 4_. 3. Healthy adult need an average 5 _ or _ hours of sleep. 4. If you have 6 _ situations, problems with friends, family or have difficulty 7 _ facts , you are probably not getting enough sleeping. 5. Stress is No 1 cause of 8 _ and it lead to a serious illness, problems. 6. 9_ disappears when the stressful situation passes. But if it isn’t treated from the beginning, it can become 10 _. Suitable words: monotonous , productive, insomnia, seven or eight, concentrating, important, effectively, difficult, sleeping difficulties, continuous.