M: What about your history class this afternoon, Millie?
W: We were supposed to have a history class, but Mr Johnson was ill   36 . So we had a geography class instead.
M: Your mother and I will go   37  on Saturday. Will you join us?
W: I’d like to, but I have to take an exam on Sunday. I think I’d better   38  at home and study. By the way, will you go climbing in the mountains?
M: Yes, why?
W: I know it’s summer   39  it can get quite cold in the mountains even in June, so bring a coat with you. You’ll need   40  in the early morning.
M: OK, we will.
  

A．in hospital B．in a hospital C．in a school D．at school

A．climbing B．climbs C．climbed D．walking

A．to stay B．stay C．not stay D．not to stay

A．and B．but C．so D．or

A．it B．that C．one D．ones