________its low cost, the appeal of iron as a building material lies in its strength, its resistance to fire, and its potential to span long distances.
Why don’t you tell him the truth? If I _______ you, I would.
I must go there earlier. John has suggested that I ________ an hour before the discussion begins.
--- Do you think it’s going to rain this weekend? --- __________.
. _________ is good for you going to bed early and getting up early.
--- It’s getting late. I’m afraid I must be going now. --- OK. ___________.