問題詳情
22. --Why does the Lake smell terrible?--Because large quantities of water .
(A) have polluted
(B) is being polluted
(C) has been polluted
(D) have been polluted
(A) have polluted
(B) is being polluted
(C) has been polluted
(D) have been polluted
參考答案
答案:D
難度:適中0.5
統計:A(0),B(0),C(0),D(0),E(0)
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