题目列表(包括答案和解析)
Some countries are increasing their use of natural gas, and other forms of ________.
A. source B. energy C. power D. material
Some countries are increasing their use of natural gas, and other forms of __________.
A. source B. energy C. power D. material
Some countries are increasing their use of natural gas, and other forms of ______.
A. source B. material
C. power D. energy
Some countries are increasing their use of natural gas, and other forms of __________.
A. source B. energy C. power D. material
Some countries are increasing their use of natural gas, and other forms of ______.
A．source B．energy C．power D．strength
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