________1.Corn ______ to produce polylactide (PLA) polymer film

a. used
b. is used
c. are used

_________2.The PLA polymer that _______ from corn has an inherent ability to make moisture away from the skin.

a. are made
b. is made
c. have made

_________3.They ________ strong resistance to ultraviolet light, so fabrics show little fading

a. exhibited
b. is exhibiting
c. will be exhibiting