11. I spent six months as a visiting 12. We enjoy. 13. Do you know how many edible plants grow. 14. She goes. in the river. (kayak) 15. This is the first time we have surfing the biggest waves. We have at Princeton University. (PROFESSION) , especially on the open sea. (SAILOR) 16. They last did the housework last week. They haven't 17. It's ten days since I last cleaned up the kitchen. I haven't in our own front yards? (NATURE)
