办理著作权质押登记的机关为（）
A、国家工商局
B、国家专利局
C、国家版权局
D、国家商标局
参考答案：C
It is very obvious that ______little money my father earns very month hardly support______family as large as mine.
A．the; the
B．a; the
C．the; a
D．不填; a
— What did the professor tell you to do?
— I had to write a _______ report.
[ ]
A. three-thousand words
B. three thousands word
C. three-thousand-word
D. three-thousand-words
