问题

e is less and less coal and oil, scientists are exploring new ways ofmaking use of ______ energy, such as sunlight, wind and water for power andfuel.

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

正确答案是：

同类题型

The most important _____ of the job as atypist is to be able to type fast and _______.

My friend hasn’t answered my letter yet, and I for a reply.

If you ________ faults but you still want the bicycle, ask the shop assistant to reduce the price.[ ]

It’s not safe for teenagers to give out toomuch_____ about themselves on the Internet.

下列各句中，没有语病的一项是（）