12 Isaac still managed to complete the task he had been assigned to ___________its difficulty and time constraint.
(A) since
(B) despite
(C) instead
(D) whether
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統計: A(70), B(596), C(59), D(92), E(0) #3093435
統計: A(70), B(596), C(59), D(92), E(0) #3093435