--How was your weekend, Rose?
--Awful! This was the first time I alone at home, bored to death.
A. had left
B. had been left
C. have been left
D. have been leaving
网友回答
A. had left
(答案→)B. had been left
C. have been left
D. have been leaving
解析：考查时态：在句型This was the first time +从句…中，从句的谓语是过去完成时，另外I和leave alone是被动关系，所以是过去分词的被动式，句意：--罗斯，周末怎样？--糟糕极了，这是我第一次被单独留在家里，烦得要死。选B。