高等教育 / 新发展英语综合教程(二)
The word "it" in the last sentence refers to _ _ _ _ _ _ _ .
A.seawater
B.purified water
C.the process of getting rid of the salt in seawater
D.the process of collecting salt from the sea oceans
A.seawater
B.purified water
C.the process of getting rid of the salt in seawater
D.the process of collecting salt from the sea oceans
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