Нужно вставить правильный вариант, помогите)
1) Sustainable future must ___ for the next generations.


A to be provided
B provided C be provided D have provided


2) Wastes ___ into the atmosphere, water and soil.


A to be released
B released C is released D are released


3) What would happen if we continue ___ fossil fuels at
present rate?


A to be consumed
B consuming C consume D to be consuming


4) Relatively inert silicon is sure ___ a major material
used in solar cells.


A to be B
be C to have been D ---


5) Scientists looked for the optimal way of ___ energy.


A obtaining B
obtain C obtained D to obtain


6) The ___ pressure can cause serious fault of the
engine.


A increase
B increases C increasing D to increase

1)     C be provided  
2)     D are released
3)     B consuming  
4)     A to be  
5)     A obtaining  
6)     C increasing

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