单项选择题

A．About 50 kilometers.
B．Several hundred kilometers.
C．A certain height.
D．From the starting point back to the earth.
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单项选择题
A．They will run out of coffee.B．They will successfully compete with gourmet coffee sellers.C．They will introduce new regular brands of coffee.D．They will lose some coffee business.
A．They will run out of coffee.
B．They will successfully compete with gourmet coffee sellers.
C．They will introduce new regular brands of coffee.
D．They will lose some coffee business.
单项选择题
A．It will rise an average of 1 foot.B．It will be worn down an average of 1 foot.C．It will be worn down to sea level.D．It will lose 730 million tons of solid matter.
A．It will rise an average of 1 foot.
B．It will be worn down an average of 1 foot.
C．It will be worn down to sea level.
D．It will lose 730 million tons of solid matter.
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