Who is it up decide whether to go or not? A. to toB. for forC. to forD. for to

问题补充：

Who is it up decide whether to go or not?

A. to to

B. for for

C. to for

D. for to

答案：

(答案→)A. to to

B. for for

C. to for

D. for to

解析：第一个to属于be up to这个短语，第二个to为不定式表目的状语。