— Can I go now, sir?— If you _______ leave, do it quietly.
—You can't imagine __________ fantastic fun web chatting is.—Really? But it may cause a lot of trouble sometimes.
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.