We need to promote a lifestyle that is _______to the environment.

At school, children learn a lot of _______such as maths, biology, history, geography and English.

The child that we caught _______was made to stand in the corner of the classroom.

Make sure you _______up the data on your computer, because you might get a virus.

Population explosion seems to surpass the ability of the earth to _______the demand for food.

My parents will have celebrated 30 years of _______by next week.

The singer was _______on the piano by her sister.

He did not share his secrets with other people, but he _______in her.

Great _______should be given to the conservation of endangered species.

She pays an enormous insurance premium on the family heirloom, her most _______ possession.

She _______her success to hard work.

It’s funny you should say that. I’ve just had the _______thought.

The dead man’s widow said he had had a/an _______that he would be killed in an accident.