The farm as well as its neighbouring hills we once spent so much time _____ on a

The farm as well as its neighbouring hills we once spent so much time _____ on a

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The farm as well as its neighbouring hills we once spent so much time _____ on a new look as recently as last year.  
A.on has takenB.has takenC.on having takenD.having taken

答案
A
解析
易错选B或C, we once spent so much time on实际作定语,on后所填是谓语动词,由as well as连接的并列的句子主语,谓语应和as well as之前的The farm保持一致,故用单数形式.
举一反三
The government’s efforts to cut the homework burden of primary and middle school students _____ mixed reactions
A.have drawnB.has drawnC.have been drawnD.has been drawn

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The writer and professor, whom I often refer to at the meetings, ____ famous for those works. 
A.isB.areC.amD.were

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Don"t miss the meeting. The questions to be discussed at it _____ of great importance. 
A.isB.areC.wasD.will

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The police   a prisoner.
A.are searched forB.is searching after
C.are searching forD.is searching for

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_____ New York _______ London are two of the largest cities in the world.
A.Either; or  B.Both; and
C.Neither; norD.Not only; but also

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