单项选择题

A．Soil.
B．Human population.
C．Forest.
D．Water.
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单项选择题
A．Call on people to protect sharks.B．Point out the living environment of sharks.C．Explain why the sharks are dangerous.D．An introduction to sharks.
A．Call on people to protect sharks.
B．Point out the living environment of sharks.
C．Explain why the sharks are dangerous.
D．An introduction to sharks.
填空题
When unemployed, some careerists take the opportunity to ___________________ family matters in addition to pursuing training or volunteering.
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