Every evening after dinner, if not ________ from work, I will spend some time walking my dog. (2009湖南卷)
The scientist _____ Canada and he will give us a talk when he _____ back.
He found his book this morning, but now he _____ his pen.
She ____ to her hometown several times.
It _____ Jane and Mary who helped me the other day.
I _____ to bed when the telephone rang.