It is well-known that advertising is often the most effective method of .
—Did you sec anyone coming into the building? —No, I didn’t —______? —There is no doubt about it.
. It’s been raining for almost a week. ____!
___, I think, and the problems could be settled.
—He hasn’t finished the work yet. —Well, he _____.
Be careful with such things. If you ____, you’ll drop them.