团结，则屹立；分裂，则败亡。【注意】done与having been done都可在句中作状语，与句子的主语构成动宾关系，having been done则强调动作先于谓语动词（主句的动词）发生，且后面一般跟明显的时间状语。试比较：

　　Asked about his family, he made no answer. 当被问到他的家庭情况时，他没有回答。Having been kept in the cage for half a day, the bird became hungry.被关在笼子里半天后，这只鸟饿了。The disc, digitally _____ in the studio, sounded fantastic at the party that night. (S04)

　　A. recorded B. recording C. to be recorded D. having recorded

　　2. Linda worked for the Minnesota Manufacturing and Mining Company, _____ as 3M. (Z04)

　　A. knowing B. known C. being known D. to be known

　　3. The repairs cost a lot, but it’s money well _____. (HB05)

　　A. to spend B. spent C. being spent D. spending

　　4. _____ twice, the postman refused to deliver our letters unless we chained our dog.(BJ2009)

　　A. Being bitten

　　B. Bitten

　　C. Having bitten

　　D. To be bitten

　　5._____ by a greater demand for vegetables, farmers have built more green houses. (ZJ07)

　　A. Driven B. Being driven C. To drive D. Having driven

　　6. The Town Hall _____ in 1980’s was the most distinguished building at that time. (SH07)

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