单项选择题

A．Because people might have to migrate there someday.
B．Because it is very much like the earth.
C．Because it is easier to explore than other planets.
D．Because its atmosphere is different from that of the earth.
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单项选择题
A．He set up the first university in America.B．He was one of the earliest settlers in America.C．He can best represent the spirit of early America.D．He was the most distinguished diplomat in American history.
A．He set up the first university in America.
B．He was one of the earliest settlers in America.
C．He can best represent the spirit of early America.
D．He was the most distinguished diplomat in American history.
单项选择题
A．They make decisions by tossing coins.B．They are not physically separated.C．They think exactly the same way.D．They share most of their vital organs.
A．They make decisions by tossing coins.
B．They are not physically separated.
C．They think exactly the same way.
D．They share most of their vital organs.
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