6. The competition is very fierce, so it’s difficult for us to _______ which team will succeed.
(A) deny
(B) lift
(C) flow
(D) tell
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統計: A(11), B(12), C(11), D(537), E(0) #2199390
統計: A(11), B(12), C(11), D(537), E(0) #2199390