单项选择题

When______to dough and heated, carbon dioxide is released, causing the dough to rise.

A．is added baking powder
B．added baking powder is
C．is baking powder added
D．baking powder is added
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单项选择题
With______formal art training and largely self-educated, Anna Mary Moses, known as Grandma Moses, began to paint rural scenes at the age of seventy-eight.
A．not
B．no
C．neither
D．never
单项选择题
In 1976 Sarah Caldwell became______at the Metropolitan Opera House in New York City.
A．she was the first woman to conduct
B．the first woman conductor
C．the woman was first conducting
D．the woman conducts first
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