Раскройте скобки и поставьте в Past Simple или Past Continuous

1. They (clean) the windows when it (start) to rain
2. As he (drive) to work, he (remember) that his briefcase was still at home.
3. Melanie (cook) dinner when her husband (come) home.
4. I (hear) a loud crash as I (sit) in the garden
5. She (type) a letter when her boss (arrive)
6. What is the ＿ (beautiful) city you've been to? 7. This is the ＿ ＿ (boring) book I've read. 8. Traveling by plane ＿ ＿ (fast) than traveling by train. 9. Vegetables are ＿ ＿ (healthy) than fast food. 10. A giraffe is ＿ ＿ (tall) than an elephant.