1. Encephalitis often spreads during the monsoon season because of an increase in the number of mosquitos.
2. Aid workers were spraying tents and walls with insecticide to kill mosquitos and prevent malaria in areas that were swamped by the killer waves.
3. mosquitos的解释
3. Aircraft arriving from the United States will be closely inspected for mosquitos that could transmit the virus.
4. It is spread by mosquitos that breed in ponds and puddles left by annual monsoon rains that run from June through September.