In recent years the number of environmental problems has increased greatly. One of the most dangerous problems for our planet is global warming which means that most climates all over the world are changing and getting warmer. It happens because we burn too much petrol resources, such as oil and coal, and the Earth heats up. This process can cause melting of the polar ice and the sea level rising in the future. If the climate changes there will be floods, heavy storms or severe droughts in different areas of the world.<span>We should start recycling things made of glass, paper, plastic and aluminium. We should stop smoking and plant as many trees as we can because they can give us more oxygen. We need to drive less and use public transport in order to reduce fuel burning. We are responsible for the situation.</span>
Берем предложение <span>China imported a record amount of Russian crude last month и преобразуем в следующие видовременные формы:
</span>Present Simple
China imports a record amount of Russian crude monthly.
<span>Present Continuous
</span>China is importing a record amount of Russian crude these days.
<span>Present Perfect
</span>China has imported a record amount of Russian crude this month.
<span>Present Perfect Continuous
</span>China has been importing a record amount of Russian crude for two years.
<span>Past Simple
</span>China imported a record amount of Russian crude last month.
<span>Past Continuous
</span>While <span>U.S. President Barack Obama was seeking to encourage Chinese criticism of Russia on Ukraine, </span>China was importing Russian crude.
<span>Past Perfect
</span>When U.S. President Barack Obama sought to encourage Chinese criticism of Russia on Ukraine, China had already imported a record amount of Russian crude.
<span>Past Perfect Continuous
</span>When world leaders gathered in The Hague to discuss nuclear security issues, China had been importing Russian crude <span>for two years</span>.
How many teachers are there in your school?
<span>1) </span>Didn’t have
<span>2) </span>Left
<span>3) </span>Got
<span>4) </span>Was
<span>5) </span>Wrote
<span>6) </span>Chose
<span>7) </span>Changed
<span>8) </span>Continued
<span>9) </span>Created
<span>10) </span>Followed
<span>11) </span>Presented
<span>12) </span>Appeared
<span>13) </span><span>made</span>