now satellites(卫星）are helping to forecast(预报）the weather.The

now satellites(卫星）are helping to forecast(预报）the weather.They are in___,and they can reach any part of the world.The satellites takes___of the atmosphere(大气),because this is where the weather forms.They___these pictures to the world and tell___the weather will change.
Today,nearly five hundred weather stations in sixty countries can receive satellite pictures.When they receive the new pictures,they compare them___earlier ones.Perhaps they may find that the clouds have___during the past few hours.This may mean that the weather___the ground may soon change,too.In thier___weather forecast,they can tell people about it.So the weather satellites are of great help to the scientists at the station.In the past they could___forecast the weather for about 24 or 48 hours.Now they can make good forecasts for 3 or 5 days.Soon.perhaps,they may be___to forecast for a week or ahead.