题目内容：
Directions: Complete each of the following sentences with a suitable word.1. Police say that they believe the attacks were carried ___by nationalists.
2. It's______to all of us to try to solve the problems in our neighbourhood.
3. The anti-smoking campaign had made quite an impact_____young people.
4. I've been asked to limit my speech______ten minutes maximum.
5. Dr Marion is the person_______control of all medical decisions in the hospital.
6. He struggled for mastery_________ his emotions but failed.
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