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Ответ:

Объяснение:

1. Andy (*has passed*) his exams and he is very happy. 2. David (*knows* how to play chess, but I don't. 3. . These days people *are travelling* a lot. 4. How long *has she had* that car for? 5. How often*do you go* to the gym? 6. My cousin *is running* the marathon in London next weekend. 7. 1 *haven't heard* this song for ages. 8. Where are you? We *have been waiting* ) for you for 20 minutes