答案解释:
B【解析】本文的第三段对test night“试飞”进行了说明。其中提到“The test pilot must find out?exactly what happens when the engines ale all shut?off at once.The plane begins to fall like a stone.It isthe pilot’s job to find out how he can get control of?the plane again.”即试飞员的任务是设法在发动机关闭的情况下重新控制飞机,但也就存在不能重新对飞机加以控制的可能。B项中的lose con-trol of意思是“失去对……的控制”,最贴近题意。