3 When Tim witnessed the horrible traffic accident, he called 911 without _____ .
(A) hesitation
(B) obligation
(C) impression
(D) frustration
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統計: A(681), B(156), C(137), D(66), E(0) #3116935
統計: A(681), B(156), C(137), D(66), E(0) #3116935