A few weeks spend in travelling can be just ____ in school.

问题描述:

A few weeks spend in travelling can be just ____ in school.
A a part of one's education sueful as
B as a useful part of one's education as
C part of one's education as useful
D a part of one's education as useful as

D.主要表示与.一样.用as.as 结构来表示