He hung his coat on the ____ by the door. ____ the textbook helped her understand the concepts better. NASA is an ____ for the National Aeronautics and Space Administration. The training program helped ____ her knowledge of the subject. There was a short ____ between the two performances. The ____ of the lost files took longer than expected. ____ is key to mastering a new skill. She used a ____ to remember the order of the planets in the solar system.

Memory

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