—Oh. Mary’s not here these days. Is she ill?

—_____.Her mother told me that she was in hospital.

A．I am afraid so

B．I hope not

C．I don’t mind

D．I don’t think so

防水层塑料卷材应沿隧道环向由拱顶向两侧依次铺贴，其搭接长度为：长、短边均不应小于（）。

A、100mm

B、150mm

C、200mm