29. If we don’t want to pay _____, we must leave the hotel before the check-out time. That way, we don’t need to pay more money.
(A) free
(B) debt
(C) extra
(D) regular

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統計： A(7), B(16), C(144), D(1), E(0) #3060492

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#5716206
If we don’t want to ...
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