Водород выделяется в результате взаимодействия между
1)Al и HNO3(конц.)
2)Al и H2SO4(конц.)
3)Al и HNO3(разб.)
4)Al и H2SO4(разб.)

Упр. 168. Раскройте скобки, употребляя глаго­лы в Present Continuous, Present Simple или в Future Simple.

1. I (to play) chess tomorrow. 2. I (not to play) chess tomorrow. 3. You (to play) chess tomorrow? 4. He (to play) chess every day. 5. He (not to play) chess every day. 6. He (to play) chess every day? 7. They (to play) chess now. 8. They (not to play) chess now. 9. They (to play) chess now? 10. Nick (to go) to the park now. 11. Nick (to go) to school every day. 12. Nick (to go) to school tomorrow. 13. You (to come) to my place next Sunday? 14. You (to read) this book next week? 15. You (to read) books every day? 16. You (to read) a book now? 17.1 (not to see) him tomorrow. 18. What you (to do) tomor­row? 19. What your friend (to do) tomorrow? 20. Where you (to go) next summer? 21. Where you (to go) every morning? 22. Where you (to go) now? 23. Look! Mary (to dance). 24. She (to dance) every day. 25. She (to dance) tomorrow?