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1. She is a more sympathetic listener than anyone else I know.
2. Busy as she was, she managed to find the time to proofread for me.
3. It was not until last Monday that he got his visa to the UK.
4. Provided that he told me well in advance, I would be glad to prepare for the event.
5. Although the cost of installation is very high, solar domestic heating systems are economical to use. 
6. Middle-class children do well in most education system, whereas working-class children do relatively poor.
7. Not until I left home could I realize how important the family is.
8. New Year's Day is a day when all family members gather and enjoy a family dinner.
9. His book that was published last year became the best-seller.
10. My friend George, who arrived late, was not permitted to enter the class for the exam.
11. The heated air expands and rises. As a result, an area of low pressure forms over the land.
12. Two experiments were conducted so that the hypothesis could be tested.
13. Far fewer people are killed or injured during train travel because rail travel is safer than road travel.
14. Goverments will most probably not relocate entire cities just because they are in the earthquake zones.
15. Canada is similar to the United States in that the majority of its people speak English.