It is too late to save the rainforests?Well,that remains __________.A to see B to be seen C being seen D having seen为什么选B,请给出详细的分析,

It is too late to save the rainforests?Well,that remains __________.A to see B to be seen C being seen D having seen为什么选B,请给出详细的分析,
It is too late to save the rainforests?Well,that remains __________.
A to see B to be seen C being seen D having seen
为什么选B,请给出详细的分析,

It is too late to save the rainforests?Well,that remains __________.A to see B to be seen C being seen D having seen为什么选B,请给出详细的分析,
1 remain后面的动词必须是to do结构,也就是不定式结构.
2 see是及物动词,必须在后面写上宾语,但如果没有宾语,就必须是被动语态结构.
所以答案是B to be seen.明白了吗?

Bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb