问题
选择题
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
答案：A
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.