How      _  is your grandmother? She is     _        .

How _ is your grandmother? She is _ .

A. old ; sixty B. much ; sixty C. old ; sixtieth D. much ; sixtieth

—      is your grandmother?

—She is 80years old.

A. How                                  B. How old                  C. How many                        D. What

—     is your grandmother?
—She is 80years old.