A．achieve
B．unemployed
C．courses
D．obscure
E．vividly
F．avoid
G．fruitless
H．applications
I．special
J．largely
K．little
L．materialize
M．diminish
N．increase
O．execution

A．making ethanol industry less known to people
B．putting ethanol industry under disadvantage
C．taking ethanol industry more lightly
D．taking ethanol industry more seriously