needs further discussion to decide whether we will the war operation.
A. It; join in
B. This; take part in
C. That; join in
D. There; attend
网友回答
(答案→)A. It; join in
B. This; take part in
C. That; join in
D. There; attend
解析：“whether we will join in the war operation” 是主语从句，放在句末时，要用it作形式主语。