Rewrite the pairs of sentences as one sentence using a defining or non-defining relative clause.

He admires the teacher. That teacher initiated building the school library.

➜ He admires _______ building the school library.

Complete the dialogue.

A: Can you believe that we will inhabit Mars in 20 years?

B: . But it is possible.

Odd one out.

Match.

Find and correct the mistake.

Before I turned ten, I have already collected lots of books about the universe.

Listen and choose.

She (attempts/ attempted/ attended) to cooperate with others in the team to finish the work.

Read and then decide if the following statements are True (T) or False (F).

Choose the correct word.

– What are you doing Lan?

– I'm

Read the text and match the headings with the correct paragraphs.

I never had any idea about how much training NASA's astronauts need until I read a magazine which described their job requirements and duties.

The astronauts need to have an advanced degree from a prestigious institution in engineering, biological science, physical science, or mathematics. They also have to pass a physical test which is as rigorous as a military one.

Astronauts are required to complete a special training programme, which normally lasts for two years, before they are allowed to fly into space. During the first flight, they must fly with astronauts who are extremely experienced in flying jet aircraft.

While they are in space, they have to be prepared to make repairs to their spacecraft or space station, which is not an easy task. Exterior repairs, which involve leaving the interior in a special suit and spacewalking to troubled areas, can be very hard. Astronauts also have to do scientific research in space. They do experiments together with Earth-based scientists, who consult with them on how to deal with the challenges of research in space.