1. He has been very interested in doing research on _______ since he was at high school.a. biology b. biological c. biologist d. biologically 2.You are old enough to take _______ for what you have done.a. responsible b. responsibility c. responsibly d. irresponsible 3.Many Vietnamese people ______ their lives for the revolutionary cause of the nationa. sacrifice b. sacrificed c. sacrificial d. sacrificially 4.They had a ______ candlelit dinner last night and she accepted his proposal of marriage.a. romance b. romantic c. romantically d. romanticize 5.She sent me a _______ letter thanking me for my invitation.a. polite b. politely c. politeness  d. impoliteness 6.As an _______, Mr. Pike is very worried about the increasing of juvenile delinquency.a. educate b. education c. educator d. educative Mong mn giải thích đúng hộ mình ạ hứa vote 5* + ctrlhn