The boy was badly ill.He had to drop out of school because of________.
—How do you study English so well? —I study ________ reading English magazines. A. at B. on C. By
I know him well_______ we have been friends since we were born.
Anne’s father had his daughter’s diary ________after Anne died _______illness.
To _______surprise, a large number of people from Syria come to their country.
He had to _________in hospital ________he was better.