Selecciona la opción correcta de los menús desplegables para completar el texto.
Perspiration is one of the ways ( of, to, with, for )keeping our body ' furnace' at a nice normal temperature. Actually, ( our, the, a, an ) body temperature is controlled by a centre in the Brain ( known, knowing, knew, know ) as the temperature centre. It ( consists, consist, is consisting, consisted ) of three parts: control centre, heating Centre, and a cooling centre. Suppose ( the, an, a, any ) temperature of the blood drops for ( any, some, a, whatever ) reason , The heating Centre goes to work and certain things begin to happen.