81. Millie has a good time at her birthday party.（同义句）
Millie ▲ ▲ at her birthday party.
82. There is some milk in the bottle.（改为否定句）
There ▲ ▲ milk in the bottle.
83. Simon likes playing football. (改为一般疑问句)
▲ Simon ▲ playing football ?
84. My father exercises every day. (对划线部分提问)
▲ ▲ does your father exercise?