Diana's family is a happy one. There are five people in her family--her parents, her brother, her sister and her. Her father and mother work in the same hospital. Her father is a doctor and her mother is a nurse. Her brother is a clerk in a bank. He's twenty-six years old. He can play chess well, so he often plays it with his sisters after work. Diana's sister is a college student. She studies maths. She can play the guitar. She often plays it after school. Diana is a middle school student. She can play the piano and chess. Look, she's playing chess with her brother. Her sister is playing the guitar.

(1) Diana's parents have ________ daughters.

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(2) Where does Diana's mother work?

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(3) Diana' s brother likes to play ________ at home.

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(4) What is Diana's sister?

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(5) Which of the following is not true?

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