15. The team has ____ completed the first phase of the research model and will move on to the next step next month.
(A) only
(B) even
(C) still
(D) already

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統計： A(0), B(0), C(0), D(1), E(0) #4065481

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#7617682
本題測驗概念 現在完成式與時間副詞的搭...
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