— How was your weekend Bella?　　　　— Awful! That was the first time I alone at home bored

问题补充：

— How was your weekend, Bella?

— Awful! That was the first time I alone at home, bored to death.

A. has left

B. had left

C. has been left

D. had been left

答案：

A. has left

B. had left

C. has been left

(答案→)D. had been left

解析：考查时态。It/That was the first/second… time that某人第几次……，从句用过去完成时，选D。