1. It's so heavy; it ______ be a black hole.

2. ______ it was raining, we went out.

3. The ground is wet. It ______ rained.

4. She bought ______ umbrella.

5. The Sun makes light, ______ the Moon reflects it.

6. 'Misconception' means ______.

7. He ______ have seen it; he was away.

8. 'Collapse' means ______.

9. Write a mystery story (10 lines) with direct speech and past perfect.

10. Correct the misconception: 'The Moon makes its own light.' (3 lines)