题目内容
(2010·山东聊城市高三二模) 28. -Why does the lake smell terrible?
-Because large quantities of water .
A. is being polluted B.have been polluted
C. is polluted D. has been polluted
B
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题目内容
(2010·山东聊城市高三二模) 28. -Why does the lake smell terrible?
-Because large quantities of water .
A. is being polluted B.have been polluted
C. is polluted D. has been polluted
B