Complete the passage with suitable connectors: 

(a) _______ a flood is considered to be a natural calamity, it is no doubt a blessing for the people. It is considered to be a blessing in the sense (b) _______ it makes the soil alluvial. (c) _________ silt is scattered over land after land (d) _________ makes the soil fertile. So, it can be said that the flood has (e) _______ constructive and destructive sides.