– I have got a headache. --No wonder. You ___in front of that computer too long.
He had a hard time ___ supporting the family.
The girl ____ red was coming up to the gentleman ___ long hair.
---Are you going ___ foot? ----No. we’re going ___ Tom’s car.
Reading ___ the sun is bad ___ your eyes.
A dog ran out ___ behind tha gate.