121. The architect’s proposal for the new civic center is _______ aesthetically pleasing and environmentally sustainable.
(A) either
(B) neither
(C) whether
(D) both
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統計: A(23), B(8), C(3), D(191), E(0) #3805129
統計: A(23), B(8), C(3), D(191), E(0) #3805129