2. Many countries now set limits on carbon ___________ and fine companies that exceed them.
(A)emission
(B)permission
(C) temptation
(D) omission
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統計: A(107), B(35), C(1), D(0), E(0) #1676249
統計: A(107), B(35), C(1), D(0), E(0) #1676249