mr grandfather is reading a newspaper 就划线部分提问.划线部分：reading a newspaper
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mrgrandfatherisreadinganewspaper就划线部分提问.划线部分：readinganewspapermrgrandfatherisreadinganewspaper就划线部分提
mr grandfather is reading a newspaper 就划线部分提问.划线部分：reading a newspaper
mr grandfather is reading a newspaper 就划线部分提问.划线部分：reading a newspaper
mr grandfather is reading a newspaper 就划线部分提问.划线部分：reading a newspaper
What is your grandfather doing?
What is Mr grandfather doing？