2. 外语
  3. The students are encouraged to provide ______ service to the poor students.

The students are encouraged to provide ______ service to the poor students.

admin2012-03-02  69
问题 The students are encouraged to provide ______ service to the poor students.
选项 A、valuable
B、indispensable
C、voluntary
D、initial
答案C
解析 题意是：学生们被鼓励向贫困学生提供______服务。[C]voluntary“自愿的”，符合题意。[A]valuable“有价值的”，[B]indispensable“必不可少的，必需的”，[D] initial“初始的，创始的”都不符合题意。
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大学英语四级

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