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 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. I often think of the great effort and courage it for the man to come back to apologize .A.made B.spared C.took D.found