1. Gerund or Infinitive? Underline the appropriate one.

1. I miss live/ living/ to live in London.

2. – I enjoyed see/ seeing/ to see them again.

3. He avoided help/ helping/ to help them do it because he wanted to get home early.

4. I promised do/ doing/ to do it by Friday.

5. She's expected get/ getting/ to get the job.

6. Would you like come/ coming/ to come?

7. They don't tolerate any argue/ arguing/ to argue about their decisions.

8. She taught me do/ doing/ to do it.

9. I don't feel like do/ doing/ to do it.

10. Do you mind take/ taking /to take it with you?

2. Choose the right variant or both if possible.

1. When you come to the crossroads – stop there.

- Remember to stop / stopping at the crossroads.

2. Yesterday she read the first pages of her new book.

- She began to read / reading her new book.

3. I was talking to Marc. But when my boyfriend came in, I could not talk to Marc anymore.

- I stopped to talk / talking to him.

4. We might go to England next year.

- We intend to spend / spending our holiday in England.

5. I wanted to write a letter, but I didn't know what to write. (So, I didn't write one.)

- I tried to write / writing a letter.

6. I am sorry now for something I said earlier on.

- I regret to say / saying this.

7. She read the text. Then she stopped. Now I want her to continue with the text.

- Go on to read/ reading.

8. You think your computer does not work, but you just haven't switched on the monitor yet.

- Your computer does not work? Try to switch / switching on the monitor.

9. The joke was so funny, that he bursted out in laughter.

- He started to laugh / laughing.

10. Yesterday I remembered that last year I got sick on your carpet.

- I remembered to get / getting sick on your carpet.

3. Open the brackets and use the appropriate non-finite.

Everyone knows Buzz Aldrin, the famous astronaut. But how many of us have (hear) of Eleanor Francis Helin, an engineer behind numerous successful NASA space missions? Helin was part of a group of female mathematicians (work) at NASA’s Jet Propulsion Lab in the 1960s. Nathalia Holt, the author of a book about these women – (know) as “rocket girls” – says, “If they hadn’t (work) on the lunar project, ‘man’ would not have (reach) the moon.”

The rocket girls started out at JPL in the 1950s, having (answer) a job advertisement (say) “Computers needed.” They were (call) computers because, before today’s digital devices, you needed humans (do) mathematical calculations. And the calculations had (be) extremely accurate. If someone had (make) the smallest mistake, a spacecraft bound for the moon would still be (travel) somewhere in outer space today, having (miss) its target entirely.

The rocket girls went from (be) “computers” to becoming the lab’s first computer programmers and engineers. One of the group’s early leaders, Macie Roberts, made the decision (hire) only women, and this policy continued for the next thirty years. They brought in many women who wanted (be) engineers but didn’t have the necessary qualifications. If anyone tried (employ) only men or only women today, they wouldn’t be (allow) to. But Roberts made the work environment at the lab special. The women formed close relationships and worked flexible hours (help) each other balance home and professional lives. At the same time, they felt they were (do) something really valuable. As a result, many women stayed on (work) at JPL for thirty or forty years.

Holt says that if there were more women engineers today, she probably wouldn’t have (write) the book. She hopes that the rocket girls will now get the recognition they deserve and inspire a new generation of female engineers.