The pipes have oil or water inside them, which is heated and sent to the storage tank until ______ to produce electricity.
Sorry, Madam. You'd better come tomorrow because it's __________ the visiting hours.
__________ snacks and drinks, but they also brought cards for entertainment when they had a picnic in the forest.
Mary is good at computer, so she was very __________ using computers when she was interviewed by the employer.
—Do you want me to help you with your bags? —Don't __________. They're not heavy.
—Your daughter has two children, doesn't she? —That's right. She __________ in 1972.