21. A search is underway for a tourist from Australia _________ in a remote mountain region a week ago.
(A) who was missed
(B) that went missed
(C) who went missing
(D) that was missed
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統計: A(48), B(18), C(192), D(35), E(0) #868307
統計: A(48), B(18), C(192), D(35), E(0) #868307