Pay attention _______all traffic signs when you are travelling in the street.

He was bitterly ashamed ......... her for doing such things.

We watched television ........... two hours last night.

Every student should spend .......... least two hours on his homework every night.

He’s very brave. He’s not afraid ............ anything.

He insisted ______ taking us dinner.

He was successful (in/with/of/to) his job.

We were very doubtful .............. his ability.

His opinion is different _____________ mine.

Professor Moore called my attention .......... that particular mistake.

She is serious (with/about/of/for) learning to be a doctor.

Many vegetables, including tomatoes, and corn, are native ______ the New World.

The teacher tried to explain the new formula ______________ his students.

These photographs were taken _____ a friend of mine.

He worked hard ________ a mechanic for ten years before being appointed manager.

She returned ____ China after spending much time abroad.

It is very nice ______ you to take so much trouble.

Someone left a box in the garden and I fell .......... it in the dark.

He was accused _____________ having stolen a car.

He has been absent ____ school very often lately.

He is sad (about/in/on/of) his son’s laziness.