When he turned professional at the age of 11, Mike         to become a world champion by his

coach and parents.      [ ]

A. expected                  

B. was expecting      

C. was expected                

D. would be expected

汽轮机长期低负荷运转会加速（）叶片水蚀的发展。

A.末几级

B.中间级

C.调节级

D.所有级