25.Due to the economic depression, our sales ________ for months, so we are now in great financial difficulties.
(A)are dropping
(B)have been dropped
(C)had been dropping
(D)have been dropping
詳解 (共 2 筆)
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Have been ving 現在完成進...
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由於經濟衰退,我們的業績已經下跌了好幾個...
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have been Ving for ...