---Has Jack finished painting the picture yet?--- I’ve no idea. But he______ it the whole afternoon.

—What happened? I called you several times yesterday evening, but I couldn't get through.—Sorry, my sister and I ________ on the phone all the time.

There will _________ robots in people’s homes.

Robots ________ heavy work on farms in the future.

I often practice _________ English with my father.