Finding oil and petrol and digging for it is a very expensive procedure .
Finding oil and petrol , and digging for it , is a very expensive procedure . Finding oil and petrol and then digging for it is a very expensive procedure . Finding and digging for oil and petrol is a very expensive process . Finding oil and petrol and digging for it is a very expensive procedure .
Finding oil and petrol , and digging for it , is a very expensive procedure .
Verbessern Sie die Grammatik dieses Textes: Finding oil and petrol and digging for it is a very expensive procedure . Ausgabe: