227. It is necessary that the question at once.A. should settleB. be settledC. might be s

问题补充：

227. It is necessary that the question at once.

A. should settle

B. be settled

C. might be settled

D. would be settled

答案：

A. should settle

(答案→)B. be settled

C. might be settled

D. would be settled

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