2. Buses to the city center leave at regular _____. If we miss this one, we can catch the next bus 15 minutes later.
(A) differences
(B) detachments
(C) intervals
(D) terminations

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統計： A(0), B(5), C(29), D(15), E(0) #1590141

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#2211114
Buses to the city ce...
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