单项选择题

A．You can grow vegetables vertically.
B．You can raise plants in a confined area.
C．You can plant a wide variety of plants together.
D．You can make a lot of profit.
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单项选择题
A．1995.B．1997.C．1998.D．1999.
A．1995.
B．1997.
C．1998.
D．1999.
单项选择题
A．The current location of city leaders.B．Military stockpiles of ammunition.C．The main lines of transportation.D．Tall buildings in this city.
A．The current location of city leaders.
B．Military stockpiles of ammunition.
C．The main lines of transportation.
D．Tall buildings in this city.
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