单项选择题

A．earth
B．popular
C．global
D．planetary
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单项选择题
A．producedB．developedC．carried outD．experimented
A．produced
B．developed
C．carried out
D．experimented
单项选择题
A．It is wonderedB．It is realizedC．It is hopedD．It is wished
A．It is wondered
B．It is realized
C．It is hoped
D．It is wished
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