60. The instructions provided by the instructor were __________, leading to confusion among students.
(A) ambivalent
(B) ambiguous
(C) amicable
(D) amphibious
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統計: A(4), B(40), C(3), D(0), E(0) #3463152
統計: A(4), B(40), C(3), D(0), E(0) #3463152