15. A slow growth may be less burdensome to a rich country ___________ a poor country.
(A) to
(B) then
(C) as
(D) than
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統計: A(4), B(6), C(10), D(79), E(0) #1719884
統計: A(4), B(6), C(10), D(79), E(0) #1719884