按照要求改变句子。

76-77. Hello! I’m Mary. (改同义句)

      Hello！  76    77    is Mary.

78-79. Our English books are blue. (画线提问)

        78   79   are your English books?

80-81. Are they on the sofa? (改否定回答)

       80  , they  81   .

82-83. This photo is on the wall. (改复数)

        82   83   are on the wall

84. in, computer, library, a, school, game, the (连词成句，注意标点符号并需要补上一个词汇)

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