在PSA工艺过程中，吹扫压力越低，氢的回收率越高，吸附剂（）得越好，但吹扫压力受工艺条件的限制。

 — Do you think the rain will stop tomorrow?

—___________. It has rained for a whole week. It’s too wet everywhere.

A．I hope not

B．I’m sure it is

C．I’m afraid so

D．I hope so