29. Studies have disclosed that new containerships built in 2013 are 10 percent less fuel-efficient________ in 1990.
(A) than that built
(B) than those built
(C) than built
(D) than it was

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統計： A(32), B(266), C(42), D(24), E(0) #863685

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#2190235
29. Studies have dis...
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