HE KNOWS A LOT ABOUT FLYING PLANE. HE __________A PILOT WHEN HE WAS...
8.
He knows a lot about flying plane. He __________a pilot when he was young.
A. was
B. must have been
C. has been
D. would be
8.
He knows a lot about flying plane. He __________a pilot when he was young.
A. was
B. must have been
C. has been
D. would be