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 taken
B. has taken
C. on having taken
D. having taken
网友回答
(答案→)A. on has taken
B. has taken
C. on having taken
D. having taken
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.