阿摩線上測驗
2. While the rigid separation of national and international affairs is ______ for a host of issues, it is especially so in the realm of global ecology.
(A) problem
(B) problems
(C) problematically
(D) problematic
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統計： A(2), B(0), C(1), D(2), E(0) #3892291
統計： A(2), B(0), C(1), D(2), E(0) #3892291
