Currency is a particular type of money (using/used) in a state. the (purchasing/purchased) power of dollar is falling in the world market. we found the first series of experiments (completed/completing). while (made/making) the research we made use of all the data available. if (cooling/cooled) water becomes ice. the film (showing/shown) was really interesting. the device (demonstrating/demonstrated) by him was tested last week. the group (following/followed) the new method has achieved good results. the method (following/followed) by the students is being discussed at the conference. the equipment (providing/provided) by this plant is of high quality