一类高层建筑与耐火等级为一、二级的丙类厂（库）房建筑之间的防火间距应不小于()

A.25m

B.20m

C.15m

D.10m

---Does Tom know anything about the accident that happened to his father？

--- No. We ____ him anything about it.

A．don’t tell

B．aren’t telling

C．haven’t told

D．aren’t going to tell