__________ to improve the students' sight, the eye exercises are done in schools nation-wide.
The problem is _______ we can arrive there before 6:00 tomorrow morning.
The man fled aboard, trying to avoid ________.
--- Betty , welcome to my birthday party . Please make yourself at home . --- ________.
After winning war in Iraq,the country fell into new worries of economy.
The concert _______ many foreign students were invited was a feast for the eyes.