(2013·泉州质检)In a natural disaster，minutes and even seconds of warning can make the ________ between life and death.

Though the “No smoking” signs have existed for long in public places, heavy smokers often ________ them and light up cigarettes.

 After he retired, Mr. Green _______painting, but soon lost interest.

We all feel it is Jack as well as his wife that ________ for their son's bad performance at school.

I dropped my keys in the grass, but luckily Kate _______ them.