The best way to start a person's breathing at once is to use the______method填mouth-to-mouth还是mouth to mouth

The best way to start a person's breathing at once is to use the______method填mouth-to-mouth还是mouth to mouth
The best way to start a person's breathing at once is to use the______method
填mouth-to-mouth还是mouth to mouth

The best way to start a person's breathing at once is to use the______method填mouth-to-mouth还是mouth to mouth
前者,是做形容词用的,后者是副词.选前者.