. I _____________________the whole kitchen by the time Mom returns.
a. have cleaned b. had cleaned c. will have cleaned

4. The rescuers ______________________the area for hours.
a. have searched b. had searched c. will have searched

5. They _____________________ before I reached their place.
a. have left b. had left c. will have left

6. A few years ago, circumstance _________________ me to leave school.
a. have forced b. had forced c. will have forced

7. We _______________________ three times this week.
a. have exercised b. had exercised c. will have exercised​