问题
选择题
105. The waters of this great lake, which is also the world's deepest, have been ____ by waste from a chemical factory.
A．cleaned
B．cleared
C．dirtied
D．Thrown
答案
答案：C
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105. The waters of this great lake, which is also the world's deepest, have been ____ by waste from a chemical factory.
A．cleaned
B．cleared
C．dirtied
D．Thrown
答案：C