問題詳情

47. We ______ for 20 years.
(A)are in this line of business
(B)do business with European importers in washing machines
(C)have been exporting printers
(D)have established here as general exporters。

參考答案

答案:C
難度:適中0.521739
統計:A(3),B(0),C(12),D(6),E(0)

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