Sister studies hard for exams.

Meaning: This sentence is describing a sister who is studying hard for her exams.

Choice of Words: Sister is a female sibling. Studies means to learn about a subject by reading, researching, or attending classes. Hard means with a lot of effort and energy. Exams are formal tests used to measure a student's knowledge or skill. When you put them together, it means A female sibling puts in a lot of effort and energy to learn about a subject by reading, researching, or attending classes for formal tests used to measure her knowledge or skill.

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