21. We find _____ really hard to believe that Mr. White is the man pickpocketing tourists at the
museum.
(A) that
(B) it
(C) him
(D) the thing
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統計: A(674), B(2139), C(408), D(407), E(0) #3021354
統計: A(674), B(2139), C(408), D(407), E(0) #3021354