问题
What did the students find out about McKay？ 查看材料
A:He trained pilots for some time.
B:He lived longer than other pilots.
C:He died in the Second World War.
D:He was downed by the pilot Boelcke.
B:He lived longer than other pilots.
C:He died in the Second World War.
D:He was downed by the pilot Boelcke.
正确答案是：
