阿摩線上測驗
15. When she retires, Professor Charon _____ here for over thirty years, but her classes are never dull.
(A) teaches
(B) has taught
(C) will teach
(D) will have taught
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統計： A(3), B(74), C(2), D(92), E(0) #3195797
統計： A(3), B(74), C(2), D(92), E(0) #3195797
