中国联通手机音乐客户端支持的音乐格式有：（）
A.MP3
B.WAVE
C.3GP
D.MP4
参考答案：A, B, C, D
--- Did you __________ much time watching Li Na’s match last night?
--- Yes. It __________ me a few hours to watch this match.
A．spend; spent
B．spend; took
C．take; took
D．take; cost
“陕甘宁边区人民警察”是我国历史上最早的一支比较正规的人民警察队伍。( )
