____once a year by fire officials, whether a school is large of small, is a regulation that must be carried out in this country.
My parents __________ lots of food and money then to make sure I don't starve; so starving is __________ of my worries.
After the hurricane had destroyed crops and houses, the farmers in the village were __________ food and shelters.
__________ studying English, he also studies Japanese.
Videos, recordings and other learning aids are usually used __________ textbooks in language learning.
The student always asks his teacher __________ questions.