一、单项选择 （共10小题，每小题2分，计20分）
( ) 1.Neil Armstrong is the first man .
A .walk on the moon B .walk on moon
C .to walk on the moon D .to walk on moon
( ) 2 .Bruce an astronaut last year.
A .is selected to become B .was selected to as
C .is selected to as D .was selected to become
