单项选择题

()of the river has been polluted.

A．Second-three
B．Two-three
C．Two-third
D．Two-thirds

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单项选择题
Since his children have all grown up, he has nothing now.()

A．to worry about
B．worrying about
C．to be worried
D．worried
单项选择题
I know he wasn't listening to me, but I went on, hoping to get him () in the story (故事,新闻报道).

A．interesting
B．interest
C．interested
D．interests
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