11 The prison guards were instructed to isolate the prisoners who were causing problems by keeping them in _____ confinement.
(A)transmitted
(B)solitary
(C)prohibited
(D)multiple
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統計: A(177), B(884), C(429), D(155), E(0) #823506
統計: A(177), B(884), C(429), D(155), E(0) #823506