She told me _____________ her up at six o’clock.

He asked me when _____________ there.

____ is the gradual increase of temperature on the earth's surface due to greenhouse effect.

_______ is to make air, water, or soil dirty or unclean.

_____ is the removal or cutting down of all trees in an area for urban use and farm lands.

Fossil fuels which are non-renewable pollute the air and cause air ____.

In some national parks, tourists are not fully….............. of environmental protection.

Many _______ are being dumped into the water.

Choose the best answer to complete the sentence:

Coal, oil, and natural gases are _____________ energy resources.

Choose the best answer to complete the sentence:

Soil pollution can have huge impact ___________ human health.

On the web you can read ____ newspapers or magazines; you can watch videos, download music or buy anything.

She had to ____ her First Certificate Exam three times.

During the last hundred years we have done great ____ to the environment.

Fish and poultry have a much lower impact ____ the environment, and other plant proteins are even less damaging ____ the planet.

Burning garbage ____ dangerous gases to the environment, and this may lead to global warming.

The book ____ she's most famous is Dance of the Dinosaur.

If you're not sure what something means, ____ in your dictionary or use your electronic dictionary for help.

I went to classes two evenings a week and I was surprised at how quickly I ____ progress.

They’re excellent learning ____. You can store information, take notes, write essays and do calculations.