I . Change the sentences into the passive voice

1 We will use sources of enegy more effectively for our future

--> Sources of enegy ..................

2 people in the cuontryside will increase the use of biogas for cooking

--> The use of biogas..................

3 They will build a hydropower station in the north of the cuontry nexr decade

-->A hydropower.........................

4 We will solve problem of enegy shortage by using solar enegy

--> the problem of enegy...........

5 The distance from my house to ha noi is over 20 kilometers

--> it's .............................................

6 My brother often watched tv in his free time last year, but he no longer does it

--> My brother used...................

7 people in the cuontryside will use much biogas in the future

-> Much biogas....... . . . . . . ..

8 The distanxe from Ho chi minh city to Phu Quoc island is about 300km

--> it is..................................... ...

9 Road users should obey traffic rules strictly

--> Tracffic rules..........................

10 Be careful or you'll hurt yourself

--> if you are.................................