—Do you think we should accept that offer?

—Yes, we should, for we ________ such bad luck up till now, and time ________ out.[ ]

A. have had; is running  

B. had; is running

C. have; has been run  

D. have had; has been run

螺旋测微器又称外径千分尺，它是一种（）的量具。

A.精度较高

B.精度极高

C.精度不高

D.精度低