In a large bowl, combine 1 cup white flour, whole wheat flour, yeast and salt; mix well. In saucepan, heat milk, water, honey and oil until warm; add to flour mixture. Add egg. Blend at low speed until moistened; beat 3 minutes at medium speed. By hand, or with a dough hook in a mixer, gradually stir in remaining white flour to make a firm dough. Kned until smooth and elastic, approximately 5 minutes. Place in greased bowl, turning over to grease top. Cover; let rise in warm place until light and doubled in bulk, approximately 1 hour.