—Wheres my music disc? I cant see it!—Youd better the disc carefully in your bedroom.A.

问题补充：

—Wheres my music disc? I can see it!

—Youd better the disc carefully in your bedroom.

A. look up B. look through C. look for

答案：

解析：look up向上看，查阅；look through浏览，温习；look for寻找。句意：我的音乐光盘在哪儿？我看不见它了。——你最好在你的卧室里面认真的寻找。结合语境可知选C。