.---Would you have told him the answer had it been possible? .---I would have, but I _____ so busy then.
—Send me an email when you are free, will you? —________.
Many students are ________ chatting online, which wastes them plenty of time.
The crowd ________ eastward, believing that they can find gold there.
Jack became seriously ill after ________ in polluted air for many years.
The new secretary is supposed to report to the manager as soon as she ________.