She ______ have attended that meeting, for she was doing paperwork in the office then.

---Honey, stay home before I return. ---I _______, mum. 

I haven’t seen my old friends for years, I ‘m  looking  forword ______ them.

They urge the local government that the problem ________ as soon as possible.

Mary _______ be in the hospital. I saw her play basketball a minute ago.