When I was little, my mother used to sit by my bed, ______ me stories till I fell asleep.
Teenagers ______ their health because they play computer games too much.
The World War II made ______ impossible for Einstein to go on with his research.
It’s not ______ good idea to drive for four hours without ______ break.
—The government should think about the medical reform again and take measures to improve it. —___________. The medical services and efficiency are not good at the moment.
The boys, ________ with this somewhat terrifying figure, had lost their tongues.