中国与第三次科技革命的关系正确表述是 [ ]

A、全程参与

B、后期积极参与

C、首先发起

D、始终未参与

This is one of the most interesting questions that ____ asked. [ ]

A. have　　　　

B. has　　　　　　

C. have been　　　　　

D. has been