No sooner ______ down on bed ______ the telephone rang.
Two-fifths of people have reported that they get a sunburn ______ to “deepen” a brown skin, despite the fact that getting a painful sunburn just once every two years can increase the possibility of skin cancer.
He was always too hard on himself, never spending one single penny more. But he acted ________ when he helped the poor old lady.
Researchers have invented _________ ears that look and act like the real ears, giving hope to patients missing all or part of their ears.
Ever since the food safety accident, the company has carried out _______ checks on milk products to make sure that they are of high quality..
The businessman is always encouraging his employees to ______ water-based sports, hoping to develop an amateur racing team in his own company.