— What happened to the heroes at the end of the book?

— All of them _____ escape from the enemy's prison and began their new life. [ ]

A. tried to          

B. managed to          

C. wanted to          

D. did their best

FMGC在正常工作方式:

A、一部FMGC现用，另一部仅接收机组输入数据

B、一部FMGC为主用，另一部为备用

C、两部FMGC各自进行计算

D、不确定