John once worked in a remote mountain village school, which is ____only on foot.
You can not _____him _____a selfish man though he looks cold.
My sister ____a good chance to go abroad for further study of English.
Since then the number of people taking driving lessons ____20.
The patient was ___of losing his life and had to be operated on at once.
It was _____that we went camping on the mountain.