1.   And cabinets with controlled temperatures and humidity levels were added to keep meat hot and moist without having to be zapped in a microwave.

2.   Four small theaters and interactive displays will be added to keep tourists busy while they await their White House tours.

3.   More water or broth may have to be added to keep beans submerged.

4.   Then gates were added to keep out drug dealers.

5.   Twenty-four hours later, leucovorin was added to keep the methotrexate from killing the patient.

6.   Very finely ground rock salt to which carbonates, bicarbonates or starch have been added to keep it free-flowing.

7.   There, more oxygen is added to keep the fish healthy.