History is the best teacher. It _________ records the development of every period, whether it is good or not.
I would have helped you, but I ________ really occupied the whole week.
The education program ________ combining brain work with manual labor is being widely spread throughout the country.
The sooner we students ________ to the new school,the better it will be _______ our studies.
With everything ________, he started the slide show.
Occasions are quite rare ________ I have time to spend a day with my kids.