127.
To _____ visitors from feeling like they are wasting their money, the museum offers discounted tickets for visitors who leave and want to return later.
(A) prevent
(B) preventive
(C) prevention
(D) prevented
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統計: A(263), B(7), C(6), D(9), E(0) #3086120
統計: A(263), B(7), C(6), D(9), E(0) #3086120