A lot of scientists are working hard to look for some lossless and environmentally (2) sources of energy.

Listen to a conversation. Choose the correct answer, A, B or C.

What does the boy want to do?

II. Choose the option that best completes each blank in the passage. Write A, B, or C in the blank.

Nothing to Lose

We (1) fossil fuels in our daily life, but they are limited and cause pollution. A lot of scientists are working hard to look for some lossless and environmentally (2) sources of energy.

Solar energy is not new to us (3) we use it to dry things every day. Solar panels catch sun rays and change them into electricity. We know that it is renewable because the sun never stops producing sunlight.

Wind power is also an old source of energy. In the past, explorers used wind for sailing their (4) to distant lands. A single windmill can pump water and generate electricity. To get much more power all at once, people install lots of giant wind turbines on wind farms.

If we stop using fossil fuels, our planets will be (5). There is nothing to lose when we use solar energy or wind power.

I. Read the article again and do the task

REDUCING WORLD HUNGER

When most people think of bacteria, they think they are bad--and they often are. However, in 2014, three high school students from Ireland found a new, good way to use bacteria to help grow more food. The three girls-Ciara Judge, Émer Hickey, and Sophie Healy Thow--are interested in how science can help feed the Earth's growing population.

One day, Hickey's mother was in her garden, and noticed something on the roots of her pea plants. The girls learned that pea plants have lumps on their roots containing a kind of bacteria called Diazotroph. The Diazotroph bacteria help the peas grow faster. So, the girls decided to test it with other kinds of plants.

As an experiment, they added the bacteria to barley seeds. They repeated the experiment many times, and found the plants started growing in half as much time, and produced up to 30% more food than normal plants.

The girls are going to continue their research to see if the bacteria can also help other kinds of food plants. They say they take "a great interest in how the world works and how we can help those around us."

Circle T for True or F for False.

The three students are from Ireland.

II. Correct one mistake in each sentence.

I am skateboarding when I fell over.

Rearrange the words in a correct order to make a complete sentence.

I / write / a / will / song/ new / .

__________________________________________________________________

III. Complete the sentences. Write the correct forms of the verbs.

I (ride) my skateboard when I (break) my arm.