A plan has been put forward more graduates should go to work in the country.A. whenB. tha

问题补充：

A plan has been put forward more graduates should go to work in the country.

A. when

B. that

C. whether

D. how

答案：

A. when

(答案→)B. that

C. whether

D. how

解析：考查同位语从句，表达A plan的具体内容，has been put forward将名词与从句隔开，加大了难度。