The central heating system of this office building is down and several workers ______ it right now

_____fine day it is! Let’s go and fly a kite.

He slipped and broke his leg. ___________, he’ll have to be away from school for two or three months.

Where have you _____ all day —I came back at noon and I ____ in this room ever since.

We don’t doubt _______ we will complete all the projects before the year 2010