- The water was left running all night long.

- Yes. It seemed that John ___. He was the last one to leave the lab.

A．was to be blamed

B．was to blame

C． had been blamed

D． should be blamed

寿命表中评价居民健康状况的主要指标是

A．死亡概率

B．死亡率

C．尚存人数

D．死亡人数

E．预期寿命