问题

re is less coal and oil, scientists are exploring new ways of making use of _____ energy, such as sunlight, wind, and water for power and fuel.

A:primary
B:alternative
C:instant
D:unique;

正确答案是：

同类题型

Through the reform, the economic situation of China ____ much better than it used to.

I ________ to your birthday party last Sunday!– Unfortunately, you were on business.

下列有关文学常识的表述，不正确的一项是（）

Your father never watches the drama series on TV, __________—–_____________________. He thinks these drama series are boring and dull.

The heavy smoker has decided to _____ smoking,for he knows smoking _____his health. [ ]