25. Pile foundations are costly and normally economic only________ commercial structures on valuable
sites.
(A)in the case of
(B) in fulfilment of
(C) in accordance with
(D) in place of
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統計: A(25), B(8), C(21), D(5), E(0) #2379272
統計: A(25), B(8), C(21), D(5), E(0) #2379272