—What should I do if  I failed the exam?

—If I_____ you, I _____ study harder next term. [ ]

A. am; will

B. were; would

C. am; would

D. were; will

用精度为0、05mm的游标卡尺测量轴零件的轴径时，副尺的零刻线在主尺的32mm与33mm之间，副尽上数字为5的刻线与主尺上的某刻线对齐，则测得的轴径为（）mm。

A、32.05

B、33.5

C、32.5

D、33.05