Jumping out of ___ airplane at a height of 5000 kilometers is ___ unforgettable experience.
My father began to work ____ a bus driver when he was twenty years old.
This is a common mistake ____ students.
If you run ____ two hares you will catch neither.
His grandfather died ____ the wound that the enemy soldier had given him .and then his grand-mother died ____ hungry and cold.
The teacher is not only strict ____ his pupils but also strict ____ his own work.