Only by imagining and creating ____the problem．

Not until I was standing on the edge of death ____ how much I wanted to live.

Out of the crowded bus             , who was dressed in a black suit and waved to a woman.

_______, and problem will be settled.

Our bad living habits will destroy the earth. Only by changing      we live 
       save the earth.

Only when the war was over_______ to his hometown.
A. did the young soldier return        B the young soldier returned
C. returned the young soldier         D the young soldier returned

The most important thing ____ when ____an emergency is to stay calm.

_____ that air conditioners cause so much pollution, I would never have bought one.

No sooner _____ on the TV than I heard the news that the stampede in Cambodia’s capital, Phnom Penh, had left 375 victims dead．

Only when he is seriously ill ______ in hospital.