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21. She could play the violin at the age of four.
A. by 4 years old B. when she is four C. 4-year-old D. when she was four
22. When I go out, please look after my baby.
A. look at B. take care C. look in D. take care of
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21. She could play the violin at the age of four.
A. by 4 years old B. when she is four C. 4-year-old D. when she was four
22. When I go out, please look after my baby.
A. look at B. take care C. look in D. take care of