Yang Liwei，China’s first spaceman，prepared carefully for going to space so that he could be sure of success at his first _________.

A.experiment                                     B.flight

C.attempt                                                 D.try

Yang Liwei，China’s first spaceman，prepared carefully for going to space so that he could be sure of success at his first _________

1. A.
   experiment
2. B.
   flight
3. C.
   attempt
4. D.
   try