All of us have already known she will choose is the opportunity to go abroad.A. thisB. wh

问题补充：

All of us have already known she will choose is the opportunity to go abroad.

A. this

B. what

C. which

D. that

答案：

A. this

(答案→)B. what

C. which

D. that

解析：考查名词性从句。known后跟的是宾语从句，she will choose is the opportunity to go abroad是宾语从句部分，choose缺少宾语，用what引导宾语从句，宾语从句中包含一个主语从句，what she will choose是主语从句，故选B。