17. Gasoline is _____ it was a few years ago.
(A) twice expensive as
(B) twice as expensive as
(C) expensive twice as
(D) as twice expensive as
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統計: A(285), B(368), C(50), D(194), E(0) #1589707
統計: A(285), B(368), C(50), D(194), E(0) #1589707