South Korea returned to China the remains of the Chinese soldiers killed in the Korean War,_______ the friendly ties between the two countries

The expert says that nowadays there are too many problems linked to poor diet and a ________of exercise.

When the question was under discussion, Gloria _____ an idea that the prices of cars should be reduced. 

Sometimes the ______ between the reality and the dream is so great that it produces disappointment. 

After that he knew he could      _any emergency by doing what he could to the best of  his ability．