Rearrange the given words to make complete sentences.
protection/ exploration/ provide/ astronauts/ environmental/ for/ or spacewalks./ life support/ planetary/ during/ Spacesuits/ and/

=> 

In paragraph 1, what pollutes the atmosphere and rivers?

Choose the word (A, B, C or D) whose underlined part is pronounced differently.

 Choose the word from the box to complete the following passage.

Rewrite the following sentences as directed (using the suggested words) so that the meanings stay the same.

She gets bad marks because she doesn't revise the old lesson.

=> If she

Rewrite the following sentences as directed (using the suggested words) so that the meanings stay the same.

They grow rice in tropical countries.

=> Rice

Choose the word (A, B, C or D) whose main stress is different from the others.