阿摩線上測驗
22.He _____ practiced for a long time before he gave his successful performance.
(A) has
(B) had
(C) having
(D) have
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統計： A(14), B(58), C(6), D(10), E(0) #2262014
統計： A(14), B(58), C(6), D(10), E(0) #2262014
