单项选择题

A．He’s teaching a computer class.
B．He has decided to earn double degree.
C．He has decided to change his field of study.
D．He’s taking a class to update his skill.
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单项选择题
A．It receives more nutrients than it can absorb.B．It becomes oversaturated with water.C．It loses the ability to support insect life.D．It loses nutrients that aren’t replaced.
A．It receives more nutrients than it can absorb.
B．It becomes oversaturated with water.
C．It loses the ability to support insect life.
D．It loses nutrients that aren’t replaced.
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