Would you like ______ football with us tomorrow afternoon?[ ]

A. to play  

B. playing  

C. plays  

D. play

母线表面应清洁平整，不得有裂纹及夹杂物，管型，槽形母线不应有变形，扭曲现象，软母线不得有扭结、松股、断股等缺陷。