Having retired from business,he nowhimself with the welfare of the disabled and lives a meaningful life. [ ]

Do you know Mary—Yes, Mary is ______ girl, but she knows a lot about science.

________ knowledge can be acquired from books，skills must be learned through practice.[ ]

Watching TV is ______ a kind of relaxation, and it also_______ our knowledge.

Her classmates ______ her. And she ______ likes them.