问题
选择题
Principal White has been working in the school for about 20 years, ____all his energy to teaching and researching as well as the running of a healthy school.
A．devoted
B．devoting
C．to devote
D．devote
答案
答案：B
题目分析：句意：怀特负责人已经在这所学校工作了20年，他把他的全部精力用于教学和研究以及经营管理一所健康的学校。动作devote与其逻辑主语Principal White之间是主动关系，故用现在分词作状语，选B。
