阿摩線上測驗
42 The airport is a huge________ , a central area where many flights come and connect to other flights.
(A)destination
(B)concourse
(C)hub
(D)lounge
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統計： A(11), B(8), C(64), D(17), E(0) #2295970
統計： A(11), B(8), C(64), D(17), E(0) #2295970
