Question

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

Answer 1

1 used
2 purchasing
3 completed
4 making
5 cooled 
6 shown
7 demonstated
8 ?
9 followed
10 provided

Answer 2

Used
Purchasing
Completed
Making
Cooled
Shown
Demonstrated
Following
Followed
Provided