I feel _______ necessary for her to learn foreign languages because the job she will do is related to foreign business.

A. one                            B. it        C. this            D. that

（2010·湖南醴陵二中高三上第二次月考）      31. I feel _______ necessary for her to learn foreign languages because the job she will do is related to foreign business.

A. one            B. it   C. this            D. that