单项选择题

As a biologist and ecologist, he is（）all forms of hunting.

A. against
B. down
C. back
D. off

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单项选择题
What will the man probably do（）

A. Ask for a three-day leave.
B. Go out with his friend.
C. Watch films at home.
D. Go to visit Bob.
填空题
Why people can’t use all of the fresh water Because some of it is（）.
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