asleep attitude effect relieved sleepy communication cure concentrate 1. What is certain is that every ______(1)_____ must have a cause. 2. He fell _____(2)______ as soon as he went to bed. 3. I’m too ______(3)_____ to watch the end of the show. 4. I can’t ______(4)_______ on my work when I’m tired. 5. Being able to hold a conversation does not necessarily mean having effective____(5)__. 6. She had a _____(6)______ look on her face. 7. She shows a very positive ______(7)_____ to her work. 8. The ____(8)_______ for stress lies in learning to relax.