One astronaut who joined the program in 1996（ ）only after he had been applying for 12 years.
A.has been accepted B.had been accepted C.was accepted D.is accepted正确答案C
One astronaut who joined the program in 1996（ ）only after he had been applying for 12 years.
A.has been accepted B.had been accepted C.was accepted D.is accepted正确答案C
