单项选择题
This area is famous ______ its apples and it is famous ______ the home of apple.
单项选择题 Don't be anxious ______ her safety, she'll be OK.
单项选择题 Mr. Jackson devoted himself ______ teaching in the primary school.
单项选择题 I know it is difficult ______ him to talk like the lecturer, but I think he should grasp every chance.
