Read and Complete

Choose the word that best completes each blank.

Sleep does more than rest the body. While we sleep, the brain sorts through the day's experiences and decides which memories to keep. Studies show that people who learn a new skill and then sleep tend to remember it better than those who stay awake. During deep sleep, the brain appears to replay recent activity, strengthening the connections that store information. This is one reason why a good night's sleep before an exam can be more useful than staying up late to study.

Sleep plays an important role in —memorymoneymercy. As we sleep, the brain decides which experiences are worth keeping. People who learn a skill and then sleep usually remember it —betterbitterbigger than those who stay awake. For this reason, resting before an exam can be more useful than staying up —lateearlyfast to study.