by the advances in technology, many farmers have set up farms on their land.

 _____ what would happen，none of them could find a way out. 

In many countries more and more forests and even agricultural land are being lost to development, _______ much of the land to become desert. 

My sister，an inexperienced rider，was found sitting on the bicycle _________ to balance it．

Despite the great difficulty we had _____ out the plan, it paid off in the end.