阿摩線上測驗
40. Not until the bell rang _________ back to their classroom reluctantly.
(A)the students went
(B)did the students go
(C) the students had gone
(D)had the students gone
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統計： A(44), B(212), C(36), D(70), E(0) #1293409
統計： A(44), B(212), C(36), D(70), E(0) #1293409
