1. The Brown family has gone to Switzerland every winter for 4 years
2. My brother has eaten frogs' legs three times
3. Carol has been in Morocco since last month.
4. Timothy has ridden a bus to school since his car broke down
5. Jorge and Carmen have been married since 1980
6. Scientists have been concerned with the world's rainforests for many years
7. James has known how to repair a computer for a long time
8. I have wanted to go to Japan for several years
9. Maria has been excited about space exploration since she was young
10. I have had a bike for two months
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