_____ of their bad habits, the boys switched from being dependent on their parents to _____ for others.

The old man lived alone all his life and he ______ a rainy winter evening.

The girl was not very happy,so she had to give us a _____ smile.[ ]

68 It was at four o’clock in the afternoon ____ he and his grandpa reached the museum in Guanghan

David said that it was______ his strong interest in literature_____ he chose the course.