48. We desire that the tour leader ________ us immediately of any change in plans.   A)inform    B)informs    C)informed    D)has informed

熱心網友

選D..虛擬語氣..表示應該通知而沒通知..

熱心網友

D虛擬語氣

熱心網友

選B,A。B。D都是時態沖突