单项选择题

Calculations, which are astronomically exact, have been made （） with the use of computers.

A．possible
B．it possible
C．possibly
D．to be possible

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单项选择题
Eventhoughthey（）sidebysidefortwentyyears,thetwoneighborsarenotongoodterms.

A．have been lived
B．had been lived
C．had been living
D．have been living
单项选择题
He has so many inventions that he is really （） Edison of （）Japan.

A．an; the
B．an;/
C．the; the
D．the; /
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