Many countries are increasing their use of natural gas, wind and other forms of ________．

1. A.
   force
2. B.
   energy
3. C.
   power
4. D.
   material

Many countries are increasing their use of natural gas, wind and other forms of____．

　 A．power　　　　 B．force　　 C．energy　　 D．strength

Many countries are increasing their use of natural gas, wind and other forms of____．

　 A．power　　　　 B．force　　 C．energy　　 　 D．strength

Many countries are increasing their use of natural gas, wind and other forms of____．

　 A．power　　　　 　　 B．force　　 　　　 C．energy　　 　 D．strength

 Many countries are increasing their use of natural gas, wind and other forms of ______．

       A．power                 B．force                   C．energy                D．strength