阅读下面短文,将所给的五个句子填入空白处,是短文意思完整正确.(计5分)
Now satellites are helping to forecast(预报) the weather . ______The satellites take pictures of the atmosphere(大气),because this is where the weather forms(形成). ______So the scientists there can see the weather of any part of the world and tell how 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(比较) them with the earlier ones . _______This may mean that the weather forecast, _______
So the weather satellites are of a great help to the scientists at the station. ________Now they can make good forecasts for 3 or 5 days .Soon perhaps, be  able to forecast the weather for a week or more ahead(提前).

A．In the past they could forecast the weather for about 24 or 48 hours earlier.

B．They send these pictures to the weather station .

C．they can tell people about it .

D．They are in space , and they can reach any part of the world .

E. Perhaps they may find that the clouds have changed during the last few hours.