Fill in the blanks with the expressions given below. Change the forms where necessary. 1) How do governments usually ___________ the problem of air pollution in large cities? 2) As an experiment, Tom put the frog in the water which was ___________ very slowly because he wanted to see what would happen. 3) Wind can ___________ soil from the land so crops cannot grow. 4) They are spending a lot of money rebuilding the roof and the walls of the building to ______ it ______ falling down. 5) ___________ all their hard work, they met with great success. 6) Light _________ a wave, but you cannot see the wave with your eyes. 7) Our library bought many computers last week. Some of them cost _____________ $5,000. 8) The new machine they used to save the miners’ lives can drill a hole ___ wide ___ five meters and ___ deep ___ 1,300 meters. 9) When I saw the soldiers on the sports field, I _____________ my days in the army.