阿摩線上測驗
46 We _____ Mike’s birthday when the fire alarm went off.
(A) were celebrating
(B) celebrated
(C) had celebrated
(D) have celebrated
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統計： A(288), B(57), C(54), D(20), E(0) #346046
統計： A(288), B(57), C(54), D(20), E(0) #346046
