“John” and“Tom” are _______ names in the English-speaking countries.

Fortunately somebody who happened to be passing by called the emergency aid        the traffic accident occurred.

Light-to-moderate smokers were ________ to die of sudden heart problems than those who had never smoked. 

—Must I turn off the gas after cooking ? —Of course . You can never be _______ careful withthat.

—I’ve heard a hurricane had struck your hometown. —Yes, it was terrible, but ____, no one was killed.