II. Rewrite the sentences so that their meaning doesn't change (1pt)
1. Mary was sick, so she could not go to school.
→ Because..........................................................................................................
2. The last time I met him was 3 years ago
→ I haven't..........................................................................................................
3. Lan went out because she finished her homework.(so)
→ Lan..........................................................................................................
4. He is interested in doing morning exercise.
→ He.........................................................................................................