问题
Recently people have made great progress in using ____power of nature to produce____ electricity
A:going
B:to go
C:go
D:gone
B:to go
C:go
D:gone
正确答案是：
同类题型
The boy________a great interest in natural science at school.[ ]
Have a drink—No thanks, _____.
It was too cold and windy , so we could see____ people walking in the street .
Mr.Smith an imprtant part when he gave the lecture last Friday .
The most important words in this sentence have been ______, so it doesn’t make any sense．