There has been a lot of rain in California recently. Villagers and leaders there begin to be worried because they have found two birds died from a disease, West Nile Virus(病毒).
West Nile Virus is carried by mosquitoes(蚊子).The symptoms(症状) are just like the flu. However, it can cause dangerous brain problems. When it rains a lot, it will leave a lot of water in ponds and trees. These places are good for mosquitoes. Mosquitoes lay their eggs in the water. Warm weather will help the mosquito eggs to develop and then the number is increasing. Birds eat the mosquitoes and get sick. People can get the disease if they are bitten(叮咬) by mosquitoes with West Nile Virus.
The government is trying its best go stop the spread of West Nile Virus. People are asked to wear long sleeves(长袖)and pants, close their windows and shut the doors. At the same time, workers have been sent out to check the wet areas. If they find mosquitoes they will use some special medicine to kill them.
Why did the two birds die?
A. They died from West Nile Virus.
B. They could not get enough food.
C. The villagers killed them.
From the passage we know West Nile Virus is carried by ______.
A. flu                    B. mosquitoes                  C. water
People will get the disease if ______.
A. they get wet in rainy days
B. they are bitten by any mosquito
C. they are bitten by mosquitoes with West Nile Virus
People are asked to wear long sleeves and pants in order to ______.
A. keep warm
B. check the wet areas
C. avoid being bitten by mosquitoes