4. Since I do not fully understand your proposal, I am not in the position to make any __________ on it.
(A) difference
(B) solution
(C) demand
(D) comment
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統計: A(14), B(26), C(9), D(130), E(0) #490868
統計: A(14), B(26), C(9), D(130), E(0) #490868