It won't be ________ she ________ everything.

It won't be ________ she ________ everything.

A.before long, learns

B.long before, learns

C.for long, learned

D.as long, will learn

答案及解析: B

考查句型。此处为句型It won't be + 段时间+ before + 从句。表示不久以后…。before此处为连词。