单项选择题
A.showed a wide interest. B.was fond of drinking. C.often worked overtime. D.liked to gossip after work.
A.worked for freshwater conservation for nonprofit purposes. B.collaborated with the Green Blue Book in freshwater conservation. C.made the author aware of freshwater shortage. D.helped the author get to know the Green Blue Book.
A.4 percent B.3 percent C.0.6 percent D.3.4 percent