单项选择题

A．produced
B．developed
C．carried out
D．experimented
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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
单项选择题
A．supplyB．offerC．provideD．support
A．supply
B．offer
C．provide
D．support
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