阿摩線上測驗
14. She ______ tennis on and off for three years.
(A) playing
(B) has been playing
(C) is playing
(D) is played
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統計： A(2), B(514), C(10), D(6), E(0) #2752384
統計： A(2), B(514), C(10), D(6), E(0) #2752384
