11.   The machine works using solar power.

12.   They had grown unaccustomed to using their power of collective action.

13.   They should also be given and encouraged to use enforcement powers where necessary.

14.   Wave power can be used to generate electricity.

15.   With plentiful coal, which could be moved easily on the railways, steam power could be used to drive machinery.

16.   You will use your powers of anticipation and imagination to read between the lines, to understand message and meaning.

17.   We used sail power and turned the engine off to save our fuel.

18.   Power can be used creatively or destructively.

19.   Local councils should use their powers to ensure strict observance of laws.