--- Julia, what were you doing when Anna called you? --- I ________ my housework and was starting to take a bath.

He is no longer in good condition, and his ability to work is limited. I _______ him to give up the job but failed.

With more forests being destroyed, huge quantities of good earth      each year.

He ______busy yesterday,or he______you with your experiment.

I suppose by the time I come back next year, all these old houses south of the Baoshehe River ________ down.