The building is ___.

    A. twenty-metre-high   B. twenty metre high   C. twenty-metres-high  D.twenty metres high

The building is _____.

A. twenty-metre-high   B. twenty metre high

C. twenty-metres-high   D. twenty metres high 

  (   ) 15. The building is ________.

A. twenty-metre-high    B. twenty –metre high

C. twenty metre high     D. twenty metres high