单项选择题

The animal source which supplies the most protein for human being is ______.

A．beef
B．fish
C．pork
D．chicken
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单项选择题
The balance between jobs and the environment can be kept if ______.
A．fishing capacity is further increased
B．fishing jobs are further increased
C．fewer well-equipped fishing ships are used
D．fewer species are allowed to rebuild
单项选择题
The passage suggests that making less use of modern technology may __
A．reduce pressure on fish populations
B．threaten the world's annual catch
C．increase government's investment
D．cost tens of millions of fishermen's jobs
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