Past perfect. Write the short answers.

1. Had they started when you registered? (-)

2. Had you watched this show before? (+)

3. Had he been here before? (-)

4. Had the game started when she bought the ticket? (+)

5. Had he solved the problem when the client called? (-)

6. Had she left before you decided to call a taxi? (+)

7. Had they furnished the house before they moved in? (+)