Question

Banking developed into an industry (a) _________ machinery that enabled more goods to be produced, which then (b) ________ to be distributed more widely. In the United States the banking industry was built on marketing methods (c) ________ during feudal times and production techniques used by Romans.(a) (i) used (ii) using (iii) use (iv) uses(b) (i) have (ii) has (iii) had (iv) having(c) (i) develops (ii) developed (iii) develop (iv) developing

Answer 1

The answer to your question is:
a)using
b)had 
c)developed