Has Tom finished his job yet —Ihave no idea of it; he _____ it this morning

How can they learn anything ______ they spend alltheir spare time watching television

下列各组句子中，加点词的意义和用法相同的一组是(　　)

Where did you get such a beautiful skirt? — It was at the department store ____ we used to shop.

The man is feeling much better now, so you ______ call a doctor.