Рассчитайте объем(н.у) водорода, который образуется при взаимодействии 8 г технического магния, содержащего 20% примесей, с раствором соляной кислоты.

Choose  the correct word  (a,b,c) to fill each gar(1-7).There is an example (0)at  the beginning. 

   They(1)           a large area. Some parks (2)             mountains and rivers. Others(3)             homes for plans  and animals. A lot of people visit national parks every year. Some choose the closest park, others go to the places that are(4)               away. But in every park the (5)            is very special/ People learn about the important role of each bird, tree and flower in the (6)            . They also learn the importance of protectong (7)                ,  because some animals and plants may (8)                if they are not protected. It is good when people are  (9)                about nature around them .      

1. a   appear        b     cover                  c   support

2. a   protect        b    discover             c    halp 

3. a   appear        b    cover                 c    provide 

4. a    over           b    ar                       c   through 

5. a    wildlife       b   pollution            c    air

6. a    Earth          b   nature reserve     c    environment 

7. a    ponds         b   nature                 c   babies

8. a    disappear    b   disturb                c     destroy 

9. a    close           b   in charge            c    concerned