-If you like the new car, why not buy it?          

-But it's really expensive.  I can't______________ it.            [ ]

A. cost            

B. afford            

C. spend          

D. pay

—How far is it from your home to the school?            

— It's about ___________[ ]

A. 10 minute walk              

B. 10 minute's walk              

C. 10 minutes walk            

D. 10 minutes' walk