阿摩線上測驗
8. To keep the discussion focused on realistic possibilities, it is ______ that active researchers in the area participate.
(A) imperative
(B) genetic
(C) faculty
(D) desperate
(E) mortal .
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統計： A(40), B(2), C(2), D(3), E(2) #939604
統計： A(40), B(2), C(2), D(3), E(2) #939604
