The basic problem, however, is that there is no central control ______ the healt

游客2025-03-20 6

问题 The basic problem, however, is that there is no central control ______ the health system.

选项 A、to
B、for
C、over
D、on

答案 C

解析 control要求接over，意为"管理，控制"。

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