___________ a sportsman is a hard job, but you are very excited if you are successful in ____________a good medal.

A．To be, get

B．Being, getting

C．Being, to get

D．To be, to get

CAI表示为( )。

A．计算机辅助设计

B．计算机辅助制造

C．计算机辅助教学

D．计算机辅助军事