I hope the lecturer wasn't referring __________ my assignment when he made that remark.

Languages __________ over time so dictionaries always need to be updated.

My teacher said my essay was __________. She couldn't follow my arguments.

It's important to teach children not to __________ lies.

These figures __________ a peak ten years ago, when over 5 million new machines were sold.

Air __________ is cheaper than many other forms of travel.

A large number of houses were __________ by the storm.

Many people believe that computer games can have a harmful __________ on our children.

My first task was to arrange the files in __________ order, from the oldest to the newest.

The train whistle warned us of its __________ departure.

The majority of cave art dates back to prehistoric __________.

Computer viruses are a modern-__________ problem.

It can take __________ time for people to get used to the system.

We must try to protect __________ animals, otherwise when a species disappears the whole ecosystem is affected.

Zoos should try to re-create the animals' __________ habitat rather than keep them in cages.

I think we should spend more money taking care of our own __________.

Many people think spending money on space __________ is a waste.

We will probably never find another planet that can __________ life.

I imagine astronauts spend a lot of time thinking about life __________ Earth.