Nylon, a synthetic _______ from a combination of water, air, and a by¬-product of coal, was first introduced in 1938. A. to make B. make C. made D. making
Nylon, a synthetic _______ from a combination of water, air, and a by-product of coal, was first introduced in 1938.
A. to make
B. make
C. made
D. making