28. Were I allowed to recommend only one marketing book to friends, this _____ it.
(A) is
(B) be
(C) will be
(D) would be
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統計: A(23), B(5), C(18), D(151), E(0) #3426357
統計: A(23), B(5), C(18), D(151), E(0) #3426357