题目内容:
As there is less and less coal and oil, scientists are exploring new ways of making use of _______ energy, such as sunlight, wind and water for power and fuel.
Aprimary
Balternative
Cinstant
Dunique
答案解析:
As there is less and less coal and oil, scientists are exploring new ways of making use of _______ energy, such as sunlight, wind and water for power and fuel.
Aprimary
Balternative
Cinstant
Dunique