39. The museum offers a variety of guided tours and special events, ___________ vary by season.
(A) some of them
(B) any of those
(C) most of which
(D) many of what
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統計: A(135), B(31), C(180), D(18), E(0) #1780134
統計: A(135), B(31), C(180), D(18), E(0) #1780134