The investigation and utilization are very important to protect environment and to energy.
A. economize
B. propagate
C. allege
D. correlation
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It was that the restaurant discriminated against black customers.
A. alleged
B. consolidated
C. segregated
D. depleted
Many institutions exchange information by hand because of computer systems.
A. incompitable
B. intelligible
C. reversible
D. ecological
We have to between politics and education.
A. differenciate
B. intelligible
C. deplete
D. maneuver
Policemen order in the streets.
A. preserve
B. allege
C. differenciate
D. eradicate