30. The social welfare system ____________ provide the underprivileged people with sufficient support.
(A)had better to 
(B)would rather to 
(C)ought to 
(D)due to

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統計： A(71), B(46), C(367), D(12), E(0) #537121

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#1487473
社會福利制度應該為貧困人民提供充分的支持...
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