1. Steve will make a report at the conference.
Active vocie, future simple
2. He often asks me to help them.
Active voice, present simple
3. Don't come in! The professor is examining students.
Active voice, present continuous
4. When the fire brigade came, the fire had destroyed the building.
Active voice, past perfect
5.The secretary was looking through morning mail.
Active voice, past continuous
6. John will have received the papers by tomorrow.
Active voice, future perfect
7.The letters are often written by him with a pencil.
Passive voice, present simple
8.This lecture will be attended by the students next week.
Passive voice, future simple
9. The grass is being cut now in the garden.
Passive voice, present continuous
10. The supper had already been prepared when we came.
Passive voice, past perfect
Не были использваны:
Active voice past simple
Active voice future continuous
Active voice present perfect
Passive voice past simple
Passive voice past continuous
Passive voice future continuos
Fill in the gaps.
There are thousands of endangered plant and animal __species_ in the world.
Global _warming__ is caused by a phenomenon known as the greenhouse effect.
The three forms of _fossil__ fuel are oil, natural gas and coal.
Greenhouse _gases__ trap heat in the atmosphere, which makes the Earth warmer.
The Antarctic _ozone__ hole was discovered in 1985.
Each molecule of __carbon_ dioxide consists of one atom of carbon and two atoms of oxygen.
Switching to ___ energy-saving light bulbs is the easiest way to start saving energy.
When we burn fossil fuels, this releases all sorts of gases into the air causing air pollution such as smog.
Climate _change__ is one of the biggest threats we face today.
We cannot see or feel __UV__ radiation, but our skin responds to it by turning darker.
