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2 CHECK. Answer the questions. Write complete sentences.

1. Where is the Mars Desert Research Station?

2. What kind of doctor helps the crew of astronauts?

3. What do the astronauts have to do before they go out to explore?

4. What are some of the challenges that astronauts have to deal with?

DISCOVER. Complete the exercises to learn about the grammar in this lesson.

Find these sentences from the blog in exercise 1. Write the missing puNnctuation—a question
mark (?) or a period ().

So life on Mars can drive you crazy

. Isn't another challenge the special suits they have to wear

. Don't the astronauts start to feel claustrophobic in the research station

. I guess that’s why they need a psychologist

Look at the sentences in exercise A and answer the questions. Write the number of each
sentence next to the correct statement.

1. These questions have the same word order as statements. __,

2. These questions begin with negative contractions (-11)

4 Surface of the planet Mars