So difficult _____it to live in an English-speaking country that I determined to learn English well.
We all do more speaking _______,even when we have a break after class.
Australia is _______ country.
“John” and“Tom” are _______ names in the English-speaking countries.
It is _______ impossible to complete the new teaching building in less than three months.
The great success of this programme has been _______ due to the support given by the local businessmen.