19. I appreciated __________ the opportunity to study abroad two years ago.
(A) having been given
(B) having being given
(C) to have been given
(D)to have given
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統計: A(329), B(24), C(171), D(15), E(0) #2023080
統計: A(329), B(24), C(171), D(15), E(0) #2023080