单项选择题

A．Physics.
B．Mathematics.
C．Environmental science.
D．Life science.
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单项选择题
A．He has a feeling of insecurity.B．He is missing his family.C．He lacks self-confidence.D．He feels ill.
A．He has a feeling of insecurity.
B．He is missing his family.
C．He lacks self-confidence.
D．He feels ill.
单项选择题
A．It will allow fewer trees to be cut.B．It will require less labor costs.C．It saves some shipping costs.D．It will make them more competition.
A．It will allow fewer trees to be cut.
B．It will require less labor costs.
C．It saves some shipping costs.
D．It will make them more competition.
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