130.
_____ you are waiting for your flight, make sure to listen for any changes in boarding times or gate numbers, which can be announced unexpectedly.
(A)Whereas
(B)While
(C)Whether
(D)Whatever
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統計: A(12), B(280), C(22), D(9), E(0) #3083512
統計: A(12), B(280), C(22), D(9), E(0) #3083512