单项选择题

A．By selling services that make life comfortable.
B．By selling land containing oil.
C．By selling public lands.
D．By selling coal and other natural products.
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单项选择题
A．He might lose his financial aid.B．He doesn’t want to attend summer classes.C．He had already missed too many classes.D．He’s afraid he might not graduate.
A．He might lose his financial aid.
B．He doesn’t want to attend summer classes.
C．He had already missed too many classes.
D．He’s afraid he might not graduate.
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