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6. the cat must be sick. he has not eaten  any food for two days. we'd better call the vet.7. our teacher has given  us a lot of tests and quizzes since the beginning of the term.8. we put a little money in our savings account every month. we want to buy a car, but we have not  saved enough money yet. we'll have enough in a few more months. 9. have you ever slept outdoors for the entire night? i mean without a tent, with nothing between you and stars. 10. my aunt puts on a wig whenever she goes out, but i have never worn a wig in my life. 11. paul's health has improved a lot since he started eating the right kinds of food, exercising regularly, and handling the stress in his life. he's never felt better. 12. i can't find my keys. i have looked everywhere — in all my pockets, in my briefcase, in my desk. they're gone.