3.Jet _______ is a temporary sleep problem that can affect anyone who quickly travels across multiple time
zones.
(A) gap
(B)lag
(C)leg
(D)tail
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統計: A(4), B(59), C(9), D(1), E(0) #1227840
統計: A(4), B(59), C(9), D(1), E(0) #1227840