Fill in the gaps with the present simple, present continuous or the past simple: 1. I played tennis yesterday but I did not win. 2. John does not write letters very often; he prefers phoning. 3. She did not go to work yesterday because she did not feel well. 4. The polar ice cap consists of millions of tons of ice. 5. You did not help your brother, did you? - No, I went to the dentist. 6. Where is Mr Moore fishing at the moment? I do not know. 7. How do you go to school? - I always go by bike. 8. My grandfather did not go to school by bike, he went on foot. 9. Last month, we enjoyed swimming in a five-star hotel. It was wonderful. 10. He last wrote three months ago. 11. Be quiet, please! I am watching a film. 12. Do you know where your brother is? - Oh, I met him an hour ago at Richmond Bridge. 13. Do you know where your brother was last night? - He spent the evening with his friends. 14. James!! Where is Dorothy? - She is outside. She is playing with her baby sister. 15. What did Dorothy do last night? - She studied French and talked to her friends on the phone. - Does she study hard? - Yes, of course, she does. 16. John is working in the garden at the moment. He likes doing this, anyway. Although he hated it when he was younger. 17. - Last year, we spent our vacation in Greece. - How did you travel? - We flew. - Did you like it there? - Yes, we had the time of our life.

Ниже — правильные формы с краткой проверкой по временам.

1. I played tennis yesterday but I did not win.
   Past Simple, потому что есть указание на завершенное действие в прошлом: yesterday.

2. John does not write letters very often; he prefers phoning.
   Present Simple, потому что речь идет о привычке и общем факте.

3. She did not go to work yesterday because she did not feel well.
   Оба глагола — Past Simple, так как ситуация относится к прошлому (yesterday).

4. The polar ice cap consists of millions of tons of ice.
   Present Simple, потому что это общеизвестный факт.

5. You did not help your brother, did you? — No, I went to the dentist.
   Все формы здесь в Past Simple, так как разговор о конкретной ситуации в прошлом.

6. Where is Mr Moore fishing at the moment? — I do not know.
   Правильно: Where is Mr Moore? — He is fishing at the moment. / I do not know.
   Если использовать именно данный вариант, естественнее было бы сказать:
   Where is Mr Moore? — He is fishing at the moment.
   Здесь нужно Present Continuous, потому что действие происходит at the moment.
   Фраза I do not know — Present Simple.

7. How do you go to school? — I always go by bike.
   Present Simple, потому что это обычное, повторяющееся действие.

8. My grandfather did not go to school by bike, he went on foot.
   Past Simple, так как речь о прошлом.

9. Last month, we enjoyed swimming in a five-star hotel. It was wonderful.
   Оба глагола — Past Simple, потому что есть указание Last month.

10. He last wrote three months ago.
    Past Simple, так как действие произошло в прошлом: three months ago.

11. Be quiet, please! I am watching a film.
    Present Continuous, потому что действие происходит прямо сейчас.

12. Do you know where your brother is? — Oh, I met him an hour ago at Richmond Bridge.
    Do you know — Present Simple,
    is — Present Simple,
    met — Past Simple, потому что есть an hour ago.

13. Do you know where your brother was last night? — He spent the evening with his friends.
    Do you know — Present Simple,
    was и spent — Past Simple, потому что есть last night.

14. James!! Where is Dorothy? — She is outside. She is playing with her baby sister.
    is, is playing — настоящее время;
    is playing — Present Continuous, потому что действие идет сейчас.

15. What did Dorothy do last night? — She studied French and talked to her friends on the phone. — Does she study hard? — Yes, of course, she does.
    did do, studied, talked — Past Simple, потому что речь о last night.
    Does she study, she does — Present Simple, потому что это уже вопрос о привычке/характеристике.

16. John is working in the garden at the moment. He likes doing this, anyway. Although he hated it when he was younger.
    is working — Present Continuous, потому что есть at the moment.
    likes — Present Simple, это общее отношение.
    hated — Past Simple, потому что речь о прошлом: when he was younger.

Last year, we spent our vacation in Greece.
How did you travel?
We flew.
Did you like it there?
Yes, we had the time of our life.

Здесь все основные формы — Past Simple, потому что весь рассказ идет о прошлом: Last year.

Итог: почти все формы у вас поставлены правильно. Единственный момент, который звучит неестественно, — предложение 6. Более грамотно будет:
Where is Mr Moore? — He is fishing at the moment. / I do not know.