The factory is ________ new techniques from abroad this year.

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It is difficult for us to learn a lesson in life ________ we've actually had that lesson.（2007·天津）

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Parents should take seriously their children's requests for sunglasses _______ eye protection is necessary in sunny weather.

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While ____, he cut himself.

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Deng Yaping and her fellow teammates, ______ China's Women Ping-pong Team, took part in the 1996 Olympic Games.

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The bridge is made ______ stone while wine is made ________ grapes.

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All the preparations for the task _________. and we are ready to start.

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A．completed

B．complete

C．had been completed

D．have been completed

He gave her a beautiful gift _______ by himself.

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I know the old man _______ white hair and thick glasses.

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His room needs ______, so he must have it ______.

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A．ainting; painted

B．ainted; painting

C．ainting; painting

D．ainted; painted