12. Environmentalists believe that we ought to leave a clean and healthy environment for our ______ to live in.
(A) patriarchs
(B) descendants
(C) creditors
(D) attorneys
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統計: A(62), B(524), C(33), D(78), E(0) #2378917
統計: A(62), B(524), C(33), D(78), E(0) #2378917