Mr. Wang, a(n)_______editor and writer, is going to attend the conference to be held in Beijing next week.

Henry's news report covering the conference was so _____ that nothing had been omitted.

She was always ______, even when things were at their worst.

In that school, English is compulsory for all students, but French and Russian are _______. 

However，at　times　this　balance　in　nature　is＿＿，resulting　in　anumber　of　possibly　unforeseen　effects．