《汽车库、修车库、停车场设计防火规范》规定，电梯井、管道井、电缆井和楼梯间应分开设置。管道井、电缆井的井壁应采用耐火极限不低于1.00h的不燃烧体。电梯井的井壁应采用耐火极限不低于()的不燃烧体。

A.1.00h

B.3.00h

C.2.50h

—Do you often see William _____ on the playground?

—No, but he is often seen to play Chinese kung fu in the park.[ ]

A. run          

B. to run   

C. ran           

D. to running