1.We all rejoiced to hear that the firsr prize had gone to Willis, who……active in this field for longer than any of us
A. has been B.was C.had been D. is
Chọn C vì cả câu này đều thuộc về quá khứ, sự việc Willis năng động xảy ra trước -> rejoiced
2.The stay in Geneva was quite useful, although...