《国际歌》的词作者是 ，曲作者是______________。
欧仁·鲍狄埃；狄盖特。
Only when I left my parents for Italy____ how much I loved them.
A．I realized
B．I had realized
C．had I realized
D．did I realize
封闭式问卷有哪些显著优点？
