Edison was a clever boy, and ______ he was fourteen, he had learned advance mathematics by himself.
Don’t leave matches or cigarettes on the table within _______ of little children.
He told me he had been offered a very well-paid _______ abroad.
Walk to work every day and you’ll soon be back in _______.
Niagara Falls is a great tourist _______,drawing millions of visitors every day.
The natural _______ of the mountains is beautiful.