I’m facing a(n) ________ about this job offer, so I intend to turn to my friends for advice.[ ]

A. dilemma

B. case

C. combination

D. adjustment

— Li Na went out of the China Open in the first round. Why should she be defeated by such 

      an unknown player?

— Well, that's OK. She __________ enough after becoming the world champion. [ ]

A. could not train

B. must not have trained  

C. can not train  

D. may not have trained