The Young Pioneers didn’t know.A. where will they goB. what they would do nextC. when coul

问题补充：

The Young Pioneers didn’t know.

A. where will they go

B. what they would do next

C. when could they go

D. how did they get there

答案：

A. where will they go

(答案→)B. what they would do next

C. when could they go

D. how did they get there

解析：考查宾语从句的语序。Know之后是宾语从句，从句要用陈述语序，而A,C,D都是疑问语序，所以选B。