5. Though not gratuitously aggressive, they are highly _____, and have given great
trouble to the Chinese authorities.
(A) indolent
(B) intractable
(C) innocuous
(D) introspective
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統計: A(2), B(21), C(4), D(2), E(0) #1811709
統計: A(2), B(21), C(4), D(2), E(0) #1811709