The reason 　　he was absent from class was 　 his mother fell ill this morning.

The manager of the company told us that verylittle_____ was made of the waste material in the past

Pro. Smith will give us a report to ______ the world present economic problems.

he was arrested, he had taken_______ one-month holiday, and stayed in the country with ________ 18-year-oldgirl, one of his students

We have to wait until the discussion between them ____.