We can’t go home _____ the heavy rain and we have to wait _____it stops.[ ]

Have you finished you work? Yes, I have finished it. I finished it 1 hour ago.

The little boy who got lost decided to remain _____ he was and waited for his dad．

Look at ______ book on the desk . Is it ______ useful one ?–Yes, it is . In the book there is much advice on how to learn math well.

It was last year _____ I visited the museum _____ you had visited.